Question

Find the area of a semicircle plot of radius 14m

Answer 1

Answer:

Radius of a semicircle, r=14cm

Perimeter of a semicircle, P=(π+2)r units

∴P=(

7

22

+2)×14

=(

7

22+14

)×14=

7

36

×14=72

Perimeter of the semicircle = 72 cm.

Area of a semicircle, A=

2

πr

2

sq. units

∴A=

7

22

×

2

14×14

=308cm

2

.

Answer 2

Answer:

Given that ;

Radius of a Semi Circle ( r ) = 14m

Area of a Semi Circle ( A ) = ?

Formula :

Area of a Semi Circle ( A ) = 1 / 2 × π r²

A = 1 / 2 × 22 / 7 × 14 × 14

A = 22 × 14

A = 308 m²

Hence ;

Area of the Semi Circle ( A ) = 308 m²