Question

In triangle DEF angle F is a right triangle DE is 25 units long and EF is 24 units long. What is the length of DF

Answer 1

7 units

Explanation:

Since DEF is a right triangle, and angle F is a right angle, DE is the hypotenuse, in which we can use a^2 + b^2 = c^2 25 to the power of 2 is 625 and 24 to the power of 2 is 576. 625-576 = 49. The square root of 49 is 7