Question

juhis mother is ordering a new door mat for their front door. the mat is a semicircle and the straight side of the mat is 84 cm .what is the perimeter of the mat

Answer 1

straight side is 84.so radius is 42cm
circumference of semicircle=1/2×2πr=1/2×2×22/7×42=132.cm
perimeter of semicircle will be 132+84=216 cm

Answer 2

Answer:

Step-by-step explanation:

Hey friend......  

Perimeter = circumference

Here diameter of the mat is given,

Radius=84/2=42

Cifcumferance=

Therefore

= 22/7× 42

=132cm

Hope it helps you....