Question

6. In right triangle ABC, angle C is a right angle, AB is 25 units long, and BC is 24 units

Mong. What is the length of AC?
A. 1
B.2
C. 7
D. 49

Answer 1

C. 7

Explanation:

Draw out the triangle if you want.

You’ll notice you’ll have a hypotenuse and one other side.

Use Pythagoras’ theorem: a^2 + b^2 = c^2
c = the hypotenuse

24^2 + b^2 = 25^2

solve for b:

576 + b^2 = 625

b^2 = 625 - 576

b^2 = 49

b = 7