Find the area (in cm
2
) of a semi-circle of radius 28cm.
- A2464
- B832
- C1232
- D1664
Solution & Step-by-step Explanation
The area of a semi-circle is given by the formula:
Area=
2
1
πr
2
Given radius r=28cm and using π=
7
22
:
Area=
2
1
×
7
22
×28×28
Area=11×4×28
Area=44×28=1232cm
2
Area=
2
1
πr
2
Given radius r=28cm and using π=
7
22
:
Area=
2
1
×
7
22
×28×28
Area=11×4×28
Area=44×28=1232cm
2