Area Related to Circles Test

Result

Area Related to Circles Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

If the area and circumference of a circle are numerically equal, then its radius is

A
4 units

B
2π units

C
π units

D
2 units

Solution

Let the radius of the circle is rr units.
∴ Area of the circle = Circumference of the circle
⇒πr² = 2πr

⇒r² = 2r

⇒ r × r = 2r
⇒r = 2 units
Question 2
1 / -0

The distance around the circle is called it's__________.

A
circumference

B
area

C
diameter

D
radius

Solution

The distance around the edge of a circle (or any curvy shape) is called circumference. It is a type of perimeter.
Question 3
1 / -0

We generally take π = 22/7 or 3.14 approximately, but π is

A
a rational number

B
an irrational number

C
an integer

D
a natural number

Solution

We generally take π = 22/7or 3.14 approximately, but π is an irrational number.

π has decimal expansion as non terminating and non-repeating so it is an irrational number. To solve our problem its approximation is taken as 22/7 or 3.14