99 Answered Questions for the topic Triangle

10/11/19

Which rotation will carry a regular octagon onto itself?

A. 60 counterclockwise rotation B. 90 counterclockwise rotationC. 120 counterclockwise rotationD. 200 counterclockwise rotation

05/16/19

Plz plz plz help I'm confused

Two right triangles are similar. The base of the larger triangle is 4 times the size of the base of the smaller triangle. The height of the larger triangle is 16cm. The area of the smaller triangle... more

03/24/19

Can a non-equilateral triangle with integer sides and integer angles (in degrees) exist?

I'm wondering if a triangle with integer sides and integer angles in degrees exists, which is not equilateral. Could someone come up with a proof for why or why not? *Edit:* Please do not answer... more

03/23/19

Where does the $-2ab$ term come from in the cosine law?

I understand that in the cosine rule i.e. $c^2 = a^2 + b^2 - 2ab \\cos C$, the cosine function acts to bring down the value of $c^2$ for acute angles ($\\cos C>0$, $-2ab\\cos C<0$ ) and... more

03/21/19

In a 30-60 right triangle the side opposite the 30 degree angle is half the length of the hypotenuse. Why?

> In a 30-60 right triangle the side opposite the 30 degree angle is half the length of the hypotenuse. A statement from the trigonometry section of Simmons' *Precalculus in a nutshell*. Please... more

03/19/19

How to find area of triangle from its medians?

The length of three medians of a triangle are $9$,$12$ and $15$cm.The area (in sq. cm) of the triangle is a) $48$ b) $144$ c) $24$ d) $72$ I don't want whole solution just give me the hint how... more

03/19/19

Does a triangle always have a point where each side subtends equal 120° angles?

Is there a point $O$ inside a triangle $\ riangle ABC$ (any triangle) such that the angle $\\angle{AOB} = \\angle{BOC} = \\angle{AOC}$? What do we call this point?

03/19/19

Proving that the sum of any two sides of the triangle is greater than the third side?

I know it's easy to prove with the help of linear inequalities, but this time I want to prove it with the help of trigonometry. Is it possible? If yes, then how?

03/13/19

Can a non-equilateral triangle with integer sides and integer angles (in degrees) exist?

I'm wondering if a triangle with integer sides and integer angles in degrees exists, which is not equilateral. Could someone come up with a proof for why or why not? *Edit:* Please do not answer... more

03/13/19

In a 30-60 right triangle the side opposite the 30 degree angle is half the length of the hypotenuse. Why?

> In a 30-60 right triangle the side opposite the 30 degree angle is half the length of the hypotenuse. A statement from the trigonometry section of Simmons' *Precalculus in a nutshell*. Please... more

03/08/19

two sides of a triangle are the same and the third side is 10 inches larger

the perimeter of the triangle is 38 inches. two sides of the triangle have the same measure and the third side is 10 greater than the measure of the other two sides. what is the measure of all... more

03/03/19

Please help me solve this :(

If side P = 8cm, Q = 7cm and side R = 5cm. So the area of the triangle is?

02/24/19

The second angle of a triangle is 20 degrees greater than the first angle. The third angle is twice the second. Find the three angles.

I'm really bad at math, and I need some help understanding this.

01/11/19

Trigonometry Question!

A weather ballon is tethered to the ground at an angle of inclination equal to 30°. The string used is 400ft long. Caleb and Elissa are at different positions on level ground in line with the... more

10/02/18

ABC is a triangle in which angle A = 50° and angle B = Angle C. Find the angles B and C. List the steps you used to find the angle.

ABC is a triangle in which angle A = 50° and angle B = Angle C. Find the angles B and C.List the steps you used to find the angle.

08/13/18

the ratio of the side of triangle is 2;3;4and the smallest side is 6cm.find perimetar

please send me details solutions thank you sir  

06/26/18

Find the measure of angle y. Round your answer to the nearest hundredth. (please type the numerical answer only) A right triangle is shown with one leg measuri

Find the measure of angle y. Round your answer to the nearest hundredth. (please type the numerical answer only)A right triangle is shown with one leg measuring 8 and the hypotenuse is labeled 13.... more

05/15/18

Math Help!!!! How do I find the height of a triangle using the pythagorean theorem???

The triangle gives the base and the hypotenuse, how do i find the height using a^2 + b^2 + c^2?????

04/24/18

Measure the angle

In a triangle, the measure of the greatest angle is square of the measure of the smallest angle, and the third angle is double of the smallest angle. 1) What is the equation of the... more

04/10/18

Pythagorean Theorem confusion?

     A Pythagorean Theorem question i had for homework. I understand and can do Pythagorean Theorem but when I draw out this word problem, my hypotenuse is smaller than the leg and i know that's... more

03/18/18

Height problem

ABC is an isosceles triangle BC is 20 AB and AC is 30 Angle A is 120° Angle B is 30° Angle C is 30°   Please find height of this triangle using both and ONLY pythagorus theorum and... more

03/09/18

A person starts walking from home and walks:

A person starts walking from home and walks:4 miles East7 miles Southeast6 miles South1 miles Southwest3 miles East   This person has walked a total of -- miles Find the total displacement... more
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