Question

A triangle has side lengths of 15 inches and 30 inches. It also has angles that measure 45° and 20°. Which of the following identifies the possible third side length and third angle of the triangle?

Answer 1

clearly the 3rd angle is 115°

Now look at the list of sides given. All you know is that the side lengths will be in the same order as the angle magnitudes: largest side opposite the largest angle.

With no diagram to look at, it's hard to say more.

Answer 2

So whats the answer T_T

Answer 3

C anyone? Formula a+b>c. Choose one side length in answer choices. I'm going to choose 17. 15(a)+17(b)=32. 32>30(c). its the only answer choice with 17 on it. if you didn't understand, look at the formula a+b>c 15 is a and 17 is b. 15+17 is 32 and you need a number greater than 30. C. 17, 115 degrees. if it is wrong I'm so sorry I got this question right when I did it, so IDK if teachers today use other techniques.