303 Answered Questions for the topic triangles

05/26/16

Point A = (-4,3) Point B = (2,1) Point C = (-2,-3) Find the size of angle BAC?
I know that the length of AC and AB is sqrt40 and the length of BC is sqrt32. Where do I go from here?
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Triangles Area Of Triangle

05/20/16

what's the area in square units of triangle ABC?
In triangle ABC, the measure of angle A is 60 degrees and the measure of angle B is 30 degrees. If line AB is 8 units long, what's the area in square units of triangle ABC?
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Triangles Trigonometry Proof

05/02/16

Let a,b and c be the sides of a triangle. Show that a/(b+c-a) + b/(a+c-b) + c/(a+b-c) >=3
 Please help me find the step by step proof to this question.
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04/29/16

What's the value of cos D?
In triangle ABC, the measure of angle B is 90 degrees, BC=80 and AC=100. Triangle DEF is similar to ABC where vertices D, E, and F correspond with vertices A, B, C. The scale factor of DEF to ABC... more
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04/21/16

how to find side lengths of a parallelogram
A parallelogram has sides of lengths 5 and 9, and one angle is 31°.   What is the length of the smaller diagonal?   What is the length of the longer diagonal?     your answer should be... more
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Triangles Maths

04/03/16

I was asked this question oraly and I didn't understood what it ment I said I don't understand
I was asked this question oraly and I didn't understood what it ment I said I don't understand what it is I was said a brilliant student would have imagined and answered the question though I still... more
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Triangles

03/31/16

the angles of triangle abc are in the ratio of 1:3:8. The ratio of the longest side of the triangle to the next longest side is
A) 8:3 B) Radical 2: 1 C)2: Radical 3 D) Radical 6: 2 E) Radical 8: Radical 3
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03/26/16

Solve the triangle using the Law of Sines: Did I do this correctly?
Given: <B = 29 degrees. <C = 51 degrees. b = 44   51 + 29 = 80 degrees. <A = 100 degrees.   Sin51° / c = sin29°/44   c = 44sin51° / sin29°   c = 70.5   then    sin100° / a =... more
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Triangles Feet Length Height

03/21/16

What's the height of the tree?
Use similar triangles to solve. A person who is 5 feet tall is standing 117 feet from the base of a tree, and the tree casts a 126 foot shadow. The person's is 9 feet in length. What is the height... more
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Triangles Geometry

03/15/16

the lengths of the sides of triangle XYZ are 6, 7.5, and 12. if triangle abc has side lengths of 4,5 & units, are the triangles similar?
plz help me
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03/14/16

Equilateral triangle side lengths
There is a large right isosceles triangle with a hypotenuse length of 24. Inside the triangle is an equilateral triangle with a vertex on the midpoint of the hypotenuse. If the length of each side... more
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Triangles

03/14/16

Warren is painting his house using a 20 foot ladder. The ladder makes a 60 degree angle with the ground. How high up on the house is the top of the ladder?
I haven't really gotten the hang of Triangles, kinda struggling on it.                                                                                                                                
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Triangles

03/10/16

Triangles and Math
One leg of a right triangle is 7 inches longer than the length of the other shorter leg. If the hypotenuse is 8 inches longer than the short leg, find the lengths of all the sides of the right... more
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Triangles Angles

03/05/16

The measures of the angles of a triangle are in the ratio 1:3:5. What is the measure of the largest angle of this triangle?
The measure of the angles of a triangle are in the ratio 1:3:5. What is the measurement of the largest angle?
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Triangles

03/01/16

what color was the bear
4 men set up camp in the wilderness. Starting from their camp they walked ten miles south, then ten miles west, suddenly they saw a bear and ran back to their camp ten miles. what color was the bear?
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Triangles

03/01/16

If an area of a triangle is 52 square inches and has a height of 13 inches what would be the equation for solving B (base)
find the base
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Triangles

02/24/16

how to use ratios to find angle measures?
how do I solve this problem?   The measure of the angles of triangleABC are in a ratio 1:3:8. What are the angle measure?      
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Triangles Math Area

02/05/16

Triangles, circles, area
A) What is the length of each side of the smallest equilateral triangle that will hold 10 circles, each with a diameter of 1.5 inches?   B) How many square inches of the triangle's area are NOT... more
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02/04/16

A triangle contains three angles: A,B and C. Angle B is twice angle A, and angle C is 20* more than angle A. Find the measures of the three angles.
A triangle contains three angles: A,B and C. Angle B is twice angle A, and angle C is 20* more than angle A. Find the measures of the three angles. 
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Triangles

02/02/16

Angles of a triangle
The second angle of a triangular kite is 4 times as large as the first. The third angle is 5 degrees more than the sum of the other two angles. Find the measures of the other two angles
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01/19/16

Finding the side lengths of a triangle
The shortest leg of a triangle is 17 feet shorter than the other leg. The hypotenuse of this triangle is 25 feet. What are the lengths of the two legs of this triangle?   I do do not know where... more
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Triangles

01/11/16

Angle between two lines (or triangle)
Hello, I would like calculate the angle between blue lines (see link). http://imgur.com/IjQFp1B Unfortunately i don't know lenghts of triangle on the left. It's actually suns' direction line.... more
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Triangles

01/02/16

Triangle ABC has vertices A(0.6), B(4,6), and C(1,3). ketch a graph and use it to find the orthocenter, including any necessary points or slopes you had to deri
Triangle ABC has vertices A(0.6), B(4,6), and C(1,3). ketch a graph and use it to find the orthocenter, including any necessary points or slopes you had to derive. Given Triangle ABC with A(-4,-2),... more
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Triangles

12/02/15

Word problem involving shapes
The length of a rectangle is three feet more than twice it's width. The area of the triangle is 44 square feet. Find the dimensions of the triangle. 
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Triangles Word Problem

11/28/15

An isosceles triangle has a base of 4.34 cm and a height of 10 cm. Calculate the base angles.
this one i can't seem to figure out !
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