Answer:
1. Area= 4.52 cm²
2. radius=4 m Area =50.27 m²
3.Area = 78.54 m²
Explanation:
Note:
Radius is half of the diameter.
The area of the circle is given by:
- πr² where r is radius and radius is given.
- ¼*πd² where d is diameter and diameter is given.
For question:
1. r=1.2 cm
Now,
Area =π*1.2²=4.52 cm²
2.
d=8m
r=½*d=8/2=4 m
Area =π*4²=50.27m²
3.
r=5m
Area =π*5²=78.54 m²