Questions on Geometry: Triangles answered by real tutors!

Tutors Answer Your Questions about Triangles (FREE)

Question 566548: Given the altitude of a triangle being 8 how do I find the perimeter?
Click here to see answer by solver91311(24713)

Question 566548: Given the altitude of a triangle being 8 how do I find the perimeter?
Click here to see answer by stanbon(75887)

Question 566559: How do I find the perimeter of an equalateral triangle when given the altitude of 8?
Click here to see answer by solver91311(24713)

Question 566841: Suppose a radius of the unit circle makes an angle with the positive horizontal axis whose tangent equals 5 and another radius of the unit circle makes an angle with the positive horizontal axis whose tangent equals -1/5. Explain why these two radii are perpendicular to each other.
Click here to see answer by solver91311(24713)

Question 566431: could i find the two missing side lengths of a right triangle if i only know one side length and one angle measure?
Click here to see answer by KMST(5328)

Question 566836: Show that cos(x+pi/2)= -sin x for every number x
Click here to see answer by lwsshak3(11628)

Question 566996: If a triangle has a 3 inch side on each side is is a triangle?
Click here to see answer by stanbon(75887)

Question 566996: If a triangle has a 3 inch side on each side is is a triangle?
Click here to see answer by richard1234(7193)

Question 567006: The shadow of a flag pole is 20 feet long. How high is the flag pole?
Click here to see answer by solver91311(24713)

Question 567348: What angle does the line y=7/6x in the xy plane make with the positive x axis?
Click here to see answer by Alan3354(69443)

Question 567354: Hilly areas often have road signs giving the percentage grade for the road. A 5% grade, for example, means that the altitude changes by 5 feet for each 100 feet of horizontal distance.
Suppose an uphill road sign indicates a road grade of 3%. What is the angle of elevation of the road?
Click here to see answer by nerdybill(7384)

Question 567400: please help me solve this problem: one side of an equilateral triangle increased by 11 is 33 less than three times another side. if the sides are measured in inches, what are the measures of the three sides of the triangle?
I have tried a bunch of different ways and just can not figure it out. I tried doing things back words (ex:increased by 11/decreased by 11) and nothing is working your help would be much apreciated.
Click here to see answer by ankor@dixie-net.com(22740)

Question 567352: Hilly areas often have road signs giving the percentage grade for the road. A 5% grade, for example, means that the altitude changes by 5 feet for each 100 feet of horizontal distance.
What percentage grade should be put on a road sign where the angle of elevation of the road is 3 degrees?
Click here to see answer by richard1234(7193)

Question 567630: What is the angle between the horizontal (x) axis and the line containing the points (2,8) and (4,9)?
Click here to see answer by Edwin McCravy(20054)

Question 567638: A 16 foot ladeer leans against a wall at a 74degree angle of elevation find the distance from the ladder's base to the wall.

Click here to see answer by Alan3354(69443)

Question 567920: determine the altitude of an equilateral triangle if each side measures 15 centimeters

Click here to see answer by mananth(16946)

Question 568112: The three sides of a triangle have lengths 9, 16 and k. Which of the following could equal k?
I. 6
II. 16
III. 25
Choose one answer:
a. III only
b. I and III only
c. I,II, III
d. II only
e. I and II only
Click here to see answer by Edwin McCravy(20054)

Question 568114: A triangle has two sides of lengths 4 centimeters and 6 centimeters. Its area is
N square centimeters , where N is a prime number. What is the greatest possible
value of N?
Choose one answer:
a. 12
b. 11
c. 9
d. 2
Click here to see answer by Edwin McCravy(20054)

Question 568183: In the triangle y/x = 3. Which one of the following must be true?
a. 4x>z
b. 4x < z
c. 4x=z
d. it cannot be determined from the information given
The picture of the triangle shows one side is X one side is Y and one side is Z.
There is no right angle.the xy angle is obtuse, the zy and xz angles are acute.
I wish I knew how to draw the triangle for you but hopefully my description will do it.
Click here to see answer by bucky(2189)

Question 568453: how to find the height of a triangle with a base of 12 and area 54
Click here to see answer by jim_thompson5910(35256)

Question 568551: What is the area of a triangle with a base of 7 cm and a height of 8 cm?
Click here to see answer by Tatiana_Stebko(1539)

Question 568709: A doctor is performing surgery to remove a patient�s tumor. The tumor is enclosed in a triangular shaped area having all sides equal to 0.6 inches. If the surgeon decides to remove an area have sides 2.5 times as large, what will be the perimeter of the of the region removed?

Click here to see answer by solver91311(24713)

Question 568659: We are learning Similar Triangles by AA, SSS and SAS.
I am not sure how to fine the solution to the following problem by using "Similar Triangles"
If ED || AB, AB=10, BC=6, AC=8, CD=5, and GE=3, find EC, GC and EF.
Thanks.

Click here to see answer by richard1234(7193)

Question 568916: We are learning similar triangles using AA, SSS and SAS.
I am stuck on this problem using similar triangles. Can someone please help?
Thanks.
If ABG=130, and ADJ=20, find CFD, GKF, GFK, G, and GKJ.

Click here to see answer by Theo(13342)

Question 569209: how would i be able to figure out if something is a triangle for example if they would give me {8,24,25}?
Click here to see answer by Alan3354(69443)

Question 569236: The perimeter of a triangle is 23 feet. Two sides are equal and the length of the third side is 1 ft less than twice the length of an equal side. What is the length of one of the equal sides?
This is what I did:
2x-1=23
-1
2x=22
divide by 2
x=11
2(11)-1=21
This would make the two equal sides 1ft. Is this right?
Click here to see answer by stanbon(75887)

Question 569279: learning sin, cos and tan, and we are having trouble getting the correct answer for: a right triangle has a hypotenuse of 17 and an angle of 54 degrees, and we are asked to find side "w". The answer is 13.8, but we aren't getting it. We know the formula is tan=opposite/adjacent, so we put in calculator Tan 54x17 (tan54=w/17)....please help!
Click here to see answer by mananth(16946)

Question 568999: Two vertical poles have heights 6 ft. and 12 ft. A rope is stretched from the top of each poles to the bottom of the other. How far above the ground do the ropes cross?
*Note: I need to solve this problem using similar triangles.

Click here to see answer by KMST(5328)

Question 569980: Please help me solve this equation:
Click here to see answer by nyc_function(2741)

Question 569851: Which set of side lengths could not form a triangle?
a) 4,5,10 b)1,2,2 c) 11,15,20 d)55,41,37
Click here to see answer by richard1234(7193)

Question 570050: find the area of a 30-60-90 triangles with longest leg of 12

Click here to see answer by stanbon(75887)

Question 570090: I am so lost. How do I find the height of an equilateral triangle where all the sides measure 16 cm. Ive tried using the area formula but changing the result to equaling h but its just not clicking in my head right now. Help? Please?
Click here to see answer by rfer(16322)

Question 570283: if you have an isosceles triangle with both legs equaling 27 and both base angles measuring 23 degrees will the base side also equal 27?
Click here to see answer by Alan3354(69443)

Question 570297: The sides of a triangle are 30, 40 and 50. What is the ratio of the sides of the triangle?
Click here to see answer by Alan3354(69443)

Question 570115: triangle ABC has sides of 50, 90 and 130. triangle DEF has side lengths of 60, 108 and 156. Determine whether or not the two triangles are similar
Click here to see answer by KMST(5328)

Question 570631: find ar if ab is 18 milimeter
Click here to see answer by Alan3354(69443)

Question 570584: How do i determine missing side lengths,of a triangle using the degrees of a triangle?
Click here to see answer by scott8148(6628)

Question 570626: How do you find the area of a triangle with the sides 33,30 and 23. (I can NOT use Herons formula or the law of sine or cosines to find it btw. Its an extra credit problem and I need help : /
Click here to see answer by scott8148(6628)

Question 570758: ?...WHAT IS THE AREA OF AN EQUILATERAL TRIANGLE WHOSE SIDE LENGTH IS 12 CM? IS THE ANSWER 72?
Click here to see answer by mananth(16946)

Question 570511: How do you find the area of a triangle?
Click here to see answer by richard1234(7193)

Question 570878: if you have a isosceles triangle with the legs being 9 and the base is 10 find the altitude. how do you solve it. we learn a equation leg squared = half part and base but if you solve it you wouldn't get the base to be 10.
Click here to see answer by mananth(16946)

Question 570923: The length of a rectangle is 6 feet less than twice the width. The perimeter is 48 feet. Find the length and width
Click here to see answer by JBarnum(2146)

Question 570924:
One side of a triangle is half the longest side. The third side is 8 meters less than the longest side. The perimeter is 62 meters. Find all three sides.
Click here to see answer by JBarnum(2146)

Question 570936: Steve has three lengths of fence. He connects them to make a triangular pen for his dog. If the lengths are 5 meters, 6 meters, and 10 meters, what type of triangle is the dog pen?
Click here to see answer by jim_thompson5910(35256)

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