Question

find the perimeter of semicircle whose diameter is 31.5cm
pls help quick :(

Answer 1

Answer:

99

Step-by-step explanation:

Perimeter of semicircle

= πd

=

$\frac{22}{7} \times 31.5$

=22 × 4.5

$22 \times \frac{9}{2}$

We can write 4.5 as 9/2(Manipulation to get things easier)

=

$\frac{198}{2}$

=99