Question

The square below has a side length of 5 cm. What is the length of the missing side? Round your answer to the nearest whole number.

A. 4 cm
B. 5 cm
C. 6 cm
D. 7 cm

Answer 1

D. about 7 cm

Explanation:

You can use the pythagorean theorem.

You have a triangle with sides of 5 and 5, so that means the third side is:

`a^2 + b^2 = c^2 --> 5^2 + 5^2 = c^2\\25 + 25 = c^2\\50 = c^2\\c = 5√(2)`

rounding:

`5√(2) = 7`