Question

Find the Perimeter of a 45-45-90 triangle when one leg is 7.

A. 21√2
B. 14 +7√2
C. 28√2
D. 14√2

Answer 1

B. 14 +7√2

Explanation:

The lengths of the two legs are the same: 7.

The length of the hypotenuse is √2 times the length of a leg, so is 7√2.

The perimeter is the sum of the lengths of the sides:

P = 7 + 7 + 7√2

P = 14 +7√2 . . . . . matches choice B