Questions on Geometry: Triangles answered by real tutors!

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Question 579130: The front of a house is the shape of a triangle. Suppose the base of the triangle is 1m less than its height and the area of the triangle is 15m^2, Find the height of the triangle. (Hint: Use A=1/2bh.)
Click here to see answer by mananth(12270)

Question 578876: what is the formula to find the perimeter of an isoscles triangle
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Question 579254: I have worked this problem all the ways that i know how. I get 18.76 every time but that is not an answer choice. Please help if you can. I will provide all the info that is given. THANK YOU.
Q: Find the value of y that makes the triangle an acute triangle.
GIVEN: hypotnuse is 26,vertical side(x) is 18;Trying to find the y (horizontal side)
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Question 578984: a triangle has angles of size x, 2x, and 6x. Find the size of angle x.
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Question 579681: What is the length of the altitude to the hypotenuse of a right triangle whose sides have lengths 10, 24, and 26?
Click here to see answer by Edwin McCravy(8893)

Question 579529: The length of the hypotenuse of a 30°-60°-90° triangle is 12. Find the perimeter.
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Question 579844: What is the value of x if the triangle is 15 square yards?
Base of the triangle is x-5
Height of the triangle is 2x + 1
Click here to see answer by mananth(12270)

Question 579455: I'm a toymaker. I'm building a toy castle.The watchtower is an octagon. The roof of the tower is made of 8 triangular pieces. The slope of the roof should be 45°. I'm trying to calculate the corners on wich to cut each part of the roof so they fit perfectly. I came up with the following formula but have no way to check it:(((180-(360/Z))/90)*H)/2
In this formula Z refers to the number of sides and H to the slope of the roof, calculated from a vertical view. English is not my native language, so I hope you can understand wat I want.
Click here to see answer by KMST(1868)

Question 579900: assume x is an acute angle in a right triangle
sin x= 3/4; cos x
how do i solve this?

Click here to see answer by mananth(12270)

Question 580125: Find the missing measurement for the triangle with perimeter (34 + x) cm.
Click here to see answer by Alan3354(30993)

Question 580246: The measure of two angles of a triangle are given.Give the measures of the third angle.
25 degrees , 50 degrees
Click here to see answer by jim_thompson5910(28536)

Question 580259: The measures of two angles of a triangle are given. Give the measures of the third angle.
10 degrees, 35 degrees
PLEASE EXPLAIN!
Click here to see answer by ankor@dixie-net.com(15646)

Question 580595: What is the length of a side of an equilateral triangle whose altitude has a length of 20?
My answer is about 23, but I'm not sure if it is correct. Also, is it possible to put the answer is simplest radical form?
Please explain. Thank you!
Click here to see answer by josmiceli(9667)

Question 580783: there is angles abc, b is 80 degrees and c is a right angle. how much degrees is c?
Click here to see answer by Alan3354(30993)

Question 581192: please help me solve this. The area of a triangle is 90 feet square. Find the altitude if the base is 30 feet.
Click here to see answer by mananth(12270)

Question 581189: SOLUTION A(2,3) B(-3,0) and C(3,-3) how would i find the midpoint of AB AC and BC?
Click here to see answer by stanbon(57285)

Question 581219: In a right angle triangle its hypotenuse is 13 cm its perpendicular is 12 cm and its base is 5 cm long. A circle is inscribed in it. Find its radius
Click here to see answer by Alan3354(30993)

Question 581287: If one side of an equilateral triangle is 12 inches, what is the perimeter of the triangle?
Click here to see answer by nerdybill(6955)

Question 581321: if each leg is x centimeters long then what is the length of the hypotenuse in terms of the leg?
Click here to see answer by richwmiller(9135)

Question 581311: The hypotenuse is 20 and one leg is 12. What is the measure of the other leg?
Click here to see answer by richwmiller(9135)

Question 581276: Find the value of x in each triangle.

a. 115
b. 125
c. 135
(No answer)
Click here to see answer by Alan3354(30993)

Question 581304: one leg of a 45-45-90 triangle is a times b. what will the hypotenuse measure?

Click here to see answer by Alan3354(30993)

Question 581739: Find the area of a scalene triangle (no 90 degree angle ) without using any
trigonometry fucntion when you are given: side a, b, c.
Please grade the difficulty of this problem.
Thank you. R. Bommarito.
Click here to see answer by lwsshak3(6490)

Question 581868: suppose that in triangle ABC, angle A is 20 degrees and angle B is 70 degrees. What is the measure of angle C?

Click here to see answer by jim_thompson5910(28536)

Question 581787: The perimeter of a triangle is 50 centimeters. The longest side is 2 centimeters longer than twice the shortest side. The other side is 3 centimeters shorter than the longest side. Find the length of longest side. I don't understand how to set this problem up???
Click here to see answer by scott8148(6628)

Question 582006: i am in algebra 1 and for homework i have to do a fill in the blank. it says, an acute triangle has all angles blank
Click here to see answer by jim_thompson5910(28536)

Question 582253: A parallelogram has a base length of 3 feet and a height of 7 feet. What is its area?
Find the surface area of a rectangular prism with a base that is 4 x 8 and a height that is 5.
Can someone please answer both? (: Please and ThankYou
Click here to see answer by KMST(1868)

Question 582464: If I have 30" on the top & 18' on the bottom when is the degree of the angle
Click here to see answer by jim_thompson5910(28536)

Question 582215: what is the lengths of the three sides of a right triangle are consecutive integers. find them
can you plz help me and show your work
Click here to see answer by KMST(1868)

Question 582852: Can a triangle be formed with two sides being six inches and one side being fourteen inches?
Click here to see answer by Alan3354(30993)

Question 582996: All triangles formed with a given length for a leg and a given length for a hypotenuse are congruent
Click here to see answer by Alan3354(30993)

Question 583079: How would you work out X if one side of a triangle was 48 degrees?
Click here to see answer by JBarnum(2044)

Question 583076: The measure of one angle of a right triangle is 3 degrees less than twice the measure of the smallest angle. Find the measure of each angle.
Click here to see answer by JBarnum(2044)

Question 583202: E measure 60 degrees.what is the value of a+d+c
Click here to see answer by solver91311(16872)

Question 583280: Base of triangle is 5cm and the other two sides are 10cm each. The height of the triangle is 8cm. What is the area.

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Question 583299: The sum of the base and the height of a triangle is 48cm. Find the dimensions for which the area is maximum. SHOW ALGEBRAICALLY. Draw and label the picture.
Click here to see answer by solver91311(16872)

Question 583444: the length of each leg of an isosceles triangle is 5 centemeters more than twice the length of the base. if the perimeter of this isosceles triangle is 95 centemeters, what is the length of the base?.

Click here to see answer by stanbon(57285)

Question 583553: How do u find the possible range of numbers for the third side? For example if im give numbers 9 and 5 how do find the third side?
Click here to see answer by JBarnum(2044)

Question 583553: How do u find the possible range of numbers for the third side? For example if im give numbers 9 and 5 how do find the third side?
Click here to see answer by Alan3354(30993)

Question 583713: In an isosceles triangle, two sides are equal. The third side is two less than twice the length of the sum of the two sides. the perimeter is 40 What are the lengths of the three sides ?
Click here to see answer by richwmiller(9135)

Question 584202: is it possible to construct a triangle with side lengths 10,11, and 20
Click here to see answer by nerdybill(6955)

Question 584372: Hello, I'm working on the following for MATH 421A(Acedemic Grade 10). I'm on unit 5 Trigonometric Ratios. I can understand a bit like how Trig' Ratios : of any acute angle, Finding size degree of each angle, Finding side lengths in any right angle and Finding angles in any right triangle. I dont know if i am looking at it wrong or just too long or what. But i have been on the same question now since last night and i think i need some help on it. I think i'm understanding the formulas a little bit. Question states : "Solve each triangle. Round each side length to the nearest unit and each angle to the nearest degree."
c=56, 33 degrees
This is how i did it :
"Nearest unit": X =33 degrees "THEN" 56 SIN 33 = 30.4 -> Answer1: 30cm
--
56
"Nearest degree": SIN-1 (33 / 56)= 36.1degrees "THEN" 90+36.1=126.1 "THEN"
180-126.1= 53.9 -> Answer2: 54 degrees
"Nearest unit again": SIN 54 degrees = 33 opp-->TAN 33 -> 23.9 ->Answer3: 24cm
-- --- --
B ajd 56

So i got every single question wrong in the back of the book.
These are the CORRECT ANSWERS:
Answer1: b=30cm Answer2:Right angle A = 57 degrees Answer3: a=47cam
Answer 1:Has a sign in the book i cant type, it is a right angle pointing to the right with a A beside it.
Answer 2 & 3: Have both lower case letters a & b and then = a unit (This case it's CM).
So i got them totally wrong, hopefully you can understand what i am trying to say and come up with a answer for me. If not, don't worry about it. I will just ask my teacher on Monday. But it would be really lovely if you could get back to me tonight or tomorrow!
Thank you very much.
Arielle MacDonald.
Click here to see answer by richwmiller(9135)

Question 584215: how to measure a right triangle if the ratio is 1:4?TIA
Click here to see answer by ankor@dixie-net.com(15646)

Question 584754: what is the length of the hypotenuse of a right triangle that has legs with lengths of 5 and 4?
Click here to see answer by nerdybill(6955)

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