Question

please help I will make branlist ​

Answer 1

Question 1:

To find the perimeter we have to add all the sides.

Perimeter = 9+9+11 = 29cm

Question 2:

We know that the perimeter/circumference of a circle is:

$2\pi \times r$

so the perimeter of this semi circle is :

$\frac{1}{2}(2\pi \times r)$

radius = 12cm

$\pi = 3.14$

$perimeter = \frac{1}{2} \times (2 \times 3.14 \times 12)$

perimeter = 37.68cm

Question 3:

The same thing applies here.

radius = 1.4 (2.8/2)

$\pi = 3.14$

$perimeter = \frac{1}{2} \times (2 \times </em><em>1.4</em><em> \times 3.14)$

perimeter =4.396cm

hope it helps

have a great day.