Question

FIND THE PERIMETER OF EACH FIGURE....​

Answer 1

Answer:

perimeter of circle=2πr, r=21metre

.2*22/7*21=132

Answer 2

Answer:

(i) 75m

(ii) 4.7m

Step-by-step explanation:

(i) Given :-

Radius = 21m (r)

=> Perimeter = 2×r + 2πrθ / 360° where θ = 90°

=> P = (2×21) + 33 = 75cm

(ii) Given :-

Radius = 0.7m

=> Perimeter = (Total Perimeter) - (Perimeter of the Enclosed Area) + 2r

=> Perimeter = 2πr - 2πrθ/360° + 2r

=> Perimeter = {2× 22/7 × 0.7} - {2 × 22/7 × 0.7 × 90° /360°} + {2 × 0.7}

=> Perimeter = 4.4 - 1.1 + 1.4 = 4.7m