Question

lesson 5: quadrilaterals
changes in dimensions on perimeter
a square has a side equal to 5 cm, what will the squares perimeter be if the side is doubled?
a. 80 cm
b. 25 cm
c. 40 cm
d. 20 cm

Explanation:

Step1: Find the new side length

The original side - length is 5 cm. If it is doubled, the new side - length $s = 2\times5=10$ cm.

Step2: Calculate the perimeter of the square

The formula for the perimeter of a square is $P = 4s$. Substitute $s = 10$ cm into the formula, we get $P=4\times10 = 40$ cm.

Answer:

C. 40 cm