The perimeter of the polygon is 27.4 centimeters. Write and solve an equation to find the unknown side length.

x = 7.1

Step-by-step explanation:

6.3 + 5.6 + 8.4 + x = 27.4

20.3 + x = 27.4

20.3 - 20.3 + x = 27.4 - 20.3

x = 27.4 - 20.3

x = 7.1

6.3 + 5.6 + 8.4 + 7.1 = 27.4

b. 24 mm

step-by-step explanation:

use the pythagorean theorem.

a^2 + b^2 = c^2

a^2 + 7^2 = 25^2

a^2 + 49 = 625

a^2 = 576

a = 24

answer: b. 24 mm