. If the radius of a semicircle is 10cm Find out its area and circumference.
Answers
157 cm2 , 31.4 cm
Step-by-step explanation:
The formula for area of semi-circle is pi * r^2/2
Thus, by substituting values in the formula, we get
Area= 3.14 x (10^2) / 2 = 157 cm2
Now, the formula of circumference is pi*r
Thus, by substituting values in the formula, we get
Circumference = 3.14 x 10 = 31.4 cm
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Given: radius of a semicircle is 10cm
To find : area and circumference.
Solution:
Radius of Semi circle = 10 cm
Area of Semi circle = (1/2) π r²
using π = 3.14
r = radius = 10 cm
Area of Semi circle = (1/2) (3.14) (10)²
= 157 cm²
Circumference of Semicircle = Diameter + arc Length
= 2(radius) + (1/2) 2 π r
= 2 * 10 + 3.14 * 10
= 20 + 31.4
= 51.4 cm
Area of Semi circle = 157 cm²
Circumference of Semicircle = 51.4 cm
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