Question

7. The perimeter of a semicircle is 108 cm. What is the area of the semicircle?
(1) 636 cm (2) 693 cm (3) 1272 cm (4) 1386 cm?​

Answer 1

Answer:

636cm²

Step-by-step explanation:

here's your answer

Answer 2

Answer:

(2) 693 cm

Step-by-step explanation:

Perimeter of the semicircle = 108 cm

so, r (2+π) = 108 cm (r = radius)

=> r (2+22/7) = 108 cm (π = 22/7)

=> r × 36/7 = 108 cm

=> r = 108 × 7/36

=> r = 21 cm

Area of the semicircle = πr²/2

=> 22/7 × 21 × 21/ 2

=> 22 × 3 × 21/2

=> 11 × 3 × 21

=> 693 cm²