Question

1.the radius of a circle is 9 centimeters, what is the area?
2the diameter of a circle is 12 inches, what is the area?
3.the radius of a circular rug is 4 feet, what is the area?
4.if diameter of a circular wall clock is 30 cm, what is the area of the clock? 5.find the area of a circular pool whose radius is 2 meters.
6.father will fence a circular garden whose radius is 3.5 m. how many meters of fencing material will he use?

Answer 1

Answer :

1) A=πr2=π·92≈254.469cm

2) Using the formulas

A=πr2

d=2r

Solving forA

A=1

4πd2=1

4·π·122≈113.09734in²

3) The radius of a circular rug is 4 feet. What is the area? Given : π =3.14 Area= Answer : A= π r2 A=3.14 x feet x feet A=- feet x feet A=---

4) If the diameter of a circular wall clock is 30 cm, what is the area of the clock? Note: Since the given is in diameter not radius and radius is half of a diameter, therefore, divide the diameter into 2 to get the radius. Answer: 30 cm / 2=15 cm radius A= π r2 A= 3.14 1 15 c x 1 1 cm A= 3.14 * 225 cm2 A=706.5 cm2. pic for 4th question.

5) A=πr2=π·22≈12.56637m²

A≈12.57m²