Question

Look at the four diagrams below. Which side length could be found WITHOUT using sin, cos, or tan?

Answer 1

Answer: Choice B

Reason: The Pythagorean theorem can be used here

`a^2+b^2 = c^2 \ \text{ where } a = x, b = 35, c = 55`

To be able to use the Pythagorean theorem, we must know two sides of a right triangle. The 'c' is always the longest side, aka hypotenuse.