Question

9.
If the perimeter of a regular pentagon is 105 cm, find the measure of its sides.
10. Find the perimeter of the following figures:​

Answer 1

Answer:

Regular Pentagon has 5 side and all are equal.

Therefore,

perimeter = sum of all the sides

perimeter = 5 × side

100 = 5 × side

side = 100 ÷ 5

side = 20cm

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Answer 2

Answer:

21cm

Step-by-step explanation:

A regular pentagon has 5 equal sides.

If each side is x,

the perimeter is 5x

5x = 105

x = 21cm