Question

ABCD is a semicircle with Centre O find the perimeter and area​

Answer 1

Step-by-step explanation:

Given,

• Diameter,d :- 14cm

We know,

• Radius,r = d/2 = 14/2 = 7cm

Formulae :-

• Perimeter of a semicircle = πr + 2r
• Area of a semicircle = πr²/2

Now substitute the values from the formula :-

1. Perimeter :-

• p = 22/7 x 7 + 2 x 7
• p = 22 + 14
• p = 36cm

2. Area :-

• a = πr²/2
• a = 22/7 x 7 x 7/2
• a = 11 x 7
• a = 77cm²

Hope it helps