Questions on Geometry: Triangles answered by real tutors!

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Geometry: Triangles

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Question 195336: Please help. If triangle ABC is congruent to triangle DEF, does it follow that Triangle CBA is congruent to triangle FED? explain. I am pretty sure that it does follow. I just don't know how to explain
Click here to see answer by Alan3354(6092)

Question 195281: find the dimensions of the figure.
triangle; area is 12 cm squared, base is x and the height is x+2 cm
rectangle; area is 160ft squared, length is x ft.and the width is x-12 ft.
Click here to see answer by honey143(2)

Question 195466: I have a right triangle with the letters "ACB" (C being 90*) the sides of the triangle are lettered "bac". bc make up the right triangle. using the variables given and the definition of sine and cosine ratios. Show that tanA = sinA / cosA
Click here to see answer by vleith(1977)

Question 195465: AS part of a surveying project, a laser beam (point "L") is targeted from ground level to a point on a building (point "P") 60meters above the ground. Find the lenght of the laser beam (LP), and find the distance the laser is positioned from the building along the ground.The ground point is "B"
Click here to see answer by vleith(1977)

Question 195464: AS part of a surveying project, a laser beam (point "L") is targeted from ground level to a point on a building (point "P") 60meters above the ground. Find the lenght of the laser beam (LP), and find the distance the laser is positioned from the building along the ground.The ground point is "B"
Click here to see answer by solver91311(5072)

Question 195490: Hi I have a question about how to find out if a set of three numbers can be sides of a triangle or not. I remember doing this in class, & I remember that it was really easy... I think it's something like if you get a certain number from using the Pythagorean Theorem, it's a right triangle, if you get this number, it's an acute, etc.... I just don't remember what exactly to do, although I do recall that it involves the Pythagorean Theorem, correct? I don't have the notes from this b/c I cleared out my binder. It gets too full if I keep all of the papers from the entire year, so I take old chapters out. No, I don't know any Pythagorean triplets, & no i don't think the units matter. This is all I remember.... This is the question:
Which of the following could not be the lengths of the sides of a triangle?
A: 5km, 2km, 4km
B: 3cm, 4cm, 5cm <== might be a triplet...
C:4in, 6in, 8in
D:6ft, 3ft, 9ft
Thank you in advance, I'd love your help! :D
Click here to see answer by stanbon(26287)

Question 187745: how do i solve this question i am having a hard time doing so

Click here to see answer by Alan3354(6092)

Question 195605: how do i find the missing length of a right triangle if a=12 and b=18
Click here to see answer by jim_thompson5910(13794)

Question 195605: how do i find the missing length of a right triangle if a=12 and b=18
Click here to see answer by stanbon(26287)

Question 195769: Find the length of the hypotenuse of a right angled triangle with one leg 7 cm longer than the other and the hypotenuse 2 cm longer than the longer leg. So the hypotenuse = x+9, one side = x and the other side = x+7. I'm not sure what to do next though.
Click here to see answer by stanbon(26287)

Question 195700: There are two similar right triangles.
The larger triangles hypotenuse is 15 and a leg is 3x, and the other is 3x+3. The smaller triangle has a hypotenuse of 5 one leg is x and the other is x+1.
How would you write an equation expressing the relationship among the length of the sides of the triangles for the smaller and the larger triangle?

Click here to see answer by J2R2R(44)

Question 195810: As part of a surveying problem, a laser beam ("L") is targeted from the ground to a point on a building (point "P")60 meters above ground. Find the lenght of the laser beam ("LP") and find the distance the laser is positioned from the building along the ground. The ground point is ("B"). The angle of the laser beam is 55*(angle LB)
Click here to see answer by jojo14344(1483)

Question 196288: how many sides do a triangle have
Click here to see answer by porter(1)

Question 196514: If the sides of a triangle are represented by 2x, x+5, and 3x-6, express the perimeter of the triangle in terms of x.
Click here to see answer by Alan3354(6092)

Question 196592This question is from textbook Algebra 1

: This question is from textbook Algebra 1

Click here to see answer by Mathtut(3670)

Question 196747: A surveyor is "shooting a line" to a point on a tree 55m from his current position. After rotating his survying equipment 25* to the left he shoots another line to a point on a fence post 25m away
a) determine distance between the point on the tree to the point on the fence post. Shoe appopriate formula,substutions, and work. Give the distance to the nearest hundreth of a meter.
b) Use the laws of Sine to find thwe measure of c) Find the m
Click here to see answer by RAY100(1637)

Question 196748: Draw a right rectangular prism that is
1) 2 units high, 3 units wide and 6 units deep

2) Explain how a net relates to a polyhedron and how you can calculate the surface of its corresponding polyhedron
Click here to see answer by RAY100(1637)

Question 196759: given that AC = 3x +4 and CG = 4x - 8
(a)find the value of x.
(b)find the length of AG.
Click here to see answer by solver91311(5072)

Question 196766: In triangle PQR, the bisectors of angle Q and angle R meets at S. Prove that Triangle QSP = 180 = x divide by 2.
i have no idea how to do this and i dont know if you need to have teh diagram and i dont know how to send you the diagram please help me on these questions i need to do them for a asignment that's worth a lot on my math mark. please and thank you!
Click here to see answer by solver91311(5072)

Question 196878: The second angle of a triangle is twice the first. The third angle is 34 degrees more than the first. Use the letter x to describe each angle of the triangle.
Solution:
Let x be the first angle
So second angle = 2x
third angle = x+34
Click here to see answer by mathsteacher(28)

Question 196898: The general equation for a plane is
Ax+By+Cz=D
Where ABC+D are real numbers and A is non-negative. Find the equation of the plane containing points (3,0,0),(0,0,6)
Show each step of your process, then graph the plane
Find the volumn

Click here to see answer by vleith(1977)

Question 197026: Give a detailed proof of the following fact: The line segment joining the midpoints of two sides of a triangle is parrallel to and half the length of the third side.
Click here to see answer by solver91311(5072)

Question 197169: If one has the measurement of the three sides of a triangle, how can one determine if the triange is real or not. The sides i have are 16, 18, and 35.
Click here to see answer by vleith(1977)

Question 196900: The table below shows how many cubed shaped blocks 4 children have. Each child is asked to make a rectangular prism using all their blocks. Only 1 child can make a rectangular prism that is more than one layer high, wide, and deep. That is, only one child can use alll of his/her blocks to make a prism not having any dimensions that are 1
which child has the appropriate number of blocks to do this, and what would the dimensions be?
why does the choosen number of blocks work and the others do not
draw a digram of the rect. solid that this child could make and determine its surface area.
Amir -10
Barb -21
Carlos -30
Dirk - 35
Click here to see answer by RAY100(1637)

Question 197403: Is it possible to draw two isosceles triangles in which all the equallength sides in both triangles are congruent, but the two triangles themselves are not similar? i don't think its possible but I'm not sure. help will be greatly appreciated.
Click here to see answer by scott8148(3382)

Question 197568: what is the area of an equilateral triangle with side lengths of 3?
Click here to see answer by nerdybill(2446)

Question 197659: a) As shown in the diagram, a ship at sea is sighted from the top of a 60-foot lighthouse. If the angle of depression of the ship from the top of the lighthouse measures is 15 degree, find to the nearest foot, how far the ship is from the base of the light house.
b) In right triangle DEF, the measure of angle E is 90 degree, the length of side EF is 7 centimeters, and the length of side DF is 12 centimeters. Find the measure of angle F to the nearest degree.
Click here to see answer by stanbon(26287)

Question 197910: I have a triange with one right angle and one side of it is 60' and the other is 140', how do i find the other side?
Click here to see answer by Ratman99(5)

Question 197934: There is a right triangle. The short leg is 7 and the long leg is 10. X is across from the right angle. How do I find X?
Click here to see answer by checkley77(7071)

Question 198063: a2+b2=c2
a=60
b=80
c=?
Click here to see answer by solver91311(5072)

Question 198133: Hello,
I need to find the side length (x) of a right triangle that is 11 units on one side and 9 units on another side. I also have to round it off to the nearest tenth. Would someone please help me. I do not know the formula. Thank you.
Click here to see answer by solver91311(5072)

Question 198249: find xw

how can i draw a triangle to show you the problem??

Click here to see answer by arallie(162)

Question 198006This question is from textbook Prealgebra & Introductory Algera
: leg = 6,hypotenuse = 10

leg = 30,leg = 15This question is from textbook Prealgebra & Introductory Algera

Click here to see answer by arallie(162)

Question 198200: : xw is an angle bisector angle yxz=9x+38, angle wxy=10x-14, angle xzy=8x. find angle wzx. is xw an altitude?
Click here to see answer by RAY100(1637)

Question 198418: If one of the legs of a right triangle is 3 and the other leg is 5, then the length of the hypotenuse is
1.square root of 34
2.34
3.square root of 8
4.8
Click here to see answer by nerdybill(2446)

Question 198393: Quadratic Equations
14. A ladder is 6m long. If the height of the top of the ladder must be no greater than 10 times the distance from the base to the wall, how high up a wall can the top of the ladder be placed? Include a diagram in your solution. Round to the nearest millimeter.
Thanks!!!!###
Click here to see answer by edjones(3298)

Question 198459: The right triangle ABC has its right angle at C. The measure of BC is 20 and the measure of angle B is 42 degree.
a) Find the measure of AC to the nearest integer.
b)Find the measure of AB to the nearest integer.
Click here to see answer by arallie(162)

Question 198426: In the accompanying diagram, right triangle ABC has its right angle at C. The measure of BC is 20 and the measure of angle B is 42 degree.
a)Find the measure of AC to the nearest integer.
b)Find the measure of AB to the nearest integer.
Click here to see answer by edjones(3298)

Question 198586: How long is the third side of a triangle when each of the other two sides are 4 feet 7 inches and there is an angle of 22.5 degrees between the two sides given
Click here to see answer by Alan3354(6092)

Question 198718: finding the shortest side of the triangle ABC. B is at the top and is 45 degrees and the C is at the right hand side and is 65 degrees, A is on the left hand side and there is no degree for that
Click here to see answer by Alan3354(6092)

Question 198825: Point A is (2,3) and point B is (6,3). Find all possible points C such that traingle ABC is equilateral.
Click here to see answer by user_dude2008(716)

Question 199111: In the right triangle ABC, angle C measures 90 degree. The length of leg AC is 7 and the length of the hypotenuse AB is 12.
a)Find, to the nearest degree, the measure of angle A.
b)Find, to the nearest integer, the length of BC.
Click here to see answer by Alan3354(6092)

Question 199144: The second angle of a triangle is 30° more than the first angle,
while the first angle is 26° more than 3 times the third angle.
What is the measure of each angle?

Click here to see answer by nerdybill(2446)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575