Question

Find the perimeter of these shapes with explanation. I will mark you as a brainliest answer .. please....please ... Friends

Answer 1

Hey mate

here is your answer

a) the shape you can see is a quadrant of a circle

so divide the perimeter by 4

$= \frac{22}{7} \times 4 \times 2 \times \frac{1}{4} \\ = \frac{22}{7} \times 2 \\ = \frac{44}{7} = 6.28$

also add the length of radius.

6.38+2*4 = 14.28 cm

b)find 3/4th perimeter of the circle and add length of radius to it

$= 2 \times \frac{22}{7} \times \frac{3}{4} \times 5.6 + 2 \times 5.6 \\ = \frac{22 \times 3 \times 5.6}{2 \times 7} + 11.2 \\ = 11 \times 3 \times 0.8 + 11.2 \\ = 11 \times 2.4 + 11.2 \\ = 26.4 + 11.2 = 37.6 \: cm$

c) find the perimeter of half circle and add length of the sides to the triangle

$= 2 \times \frac{22}{7} \times \frac{1}{2} \times 5.4 + 12 \\ = 3.14 \times 5.4 + 12 \\ = 16.95 + 12 = 28.95 \: cm$

d)

find circumference of both semi circles and add the length and breadth to it

$= \frac{22}{7} \times 2 + \frac{22}{7} \times 3.5 + 7 + 4 \\ = 6.28 + 11 + 11 \\ = 22 + 6.28 \\ = 28.28 \: cm$

hope it helps you

n don't forget to mark as brainliest answer

#answer with quality.