# Free Circles 02 Practice Test - 5th Grade

If A and B are two points on the circle, then the line joining A and B is called as the ____.

A.

point

B.

circumference

C.

centre

D.

chord

#### SOLUTION

Solution : D

A and B are two points on the circle. The line joining A and B is called chord.

The longest chord a circle is ____.

A.

Diameter

B.

C.

Point

D.

Circumference

#### SOLUTION

Solution : A

The diameter of the circle is the longest chord that passes through the center of the circle.

Here, O is the center of the circle and AB is its diameter.

Part of a circumference is _____.

A.

B.

Diameter

C.

Center

D.

Arc

#### SOLUTION

Solution : D

Circumference is the length of the boundary of a circle. A part of it is called an arc.

The ____ divides the circle into two equal parts.

A.

Diameter

B.

C.

Circle

D.

Circumference

#### SOLUTION

Solution : A

The diameter divides a circle into two equal parts.

The distance between the centre and any point on the circle is called the ____.

A.

B.

diameter

C.

circumference

D.

arc

#### SOLUTION

Solution : A

The distance between the center of a circle and any point on the circle is the radius.

Which picture shows 90 of a circle?

A.

B.

C.

D.

#### SOLUTION

Solution : A

90 of a circle is quarter of a circle (that is 14 of 360=90)

The above image is 90 of a circle.

Concentric circle have the same ____.

A.

Circumference

B.

Center

C.

Diameter

D.

#### SOLUTION

Solution : B

Circles that have the same center but different radii are called Concentric circles.

If the radius of a pizza is 18cm, then its diameter is _____cm.

A.

Half of 18

B.

2×18

C.

18×18

D.

18

#### SOLUTION

Solution : B

We know that diameter is twice the radius.
If radius of the pizza is 18cm, then diameter is 2 x 18cm.

The perimeter of a semi-circle is ____.

A.

B.

Half of Diameter

C.

Half of Circumference

D.

Twice of Circumference

#### SOLUTION

Solution : C

The perimeter of a circle is called the circumference.
Semi-circle is half of the circle and its circumference is half of the circle’s circumference.

In an archery board, the radius of the yellow circle is 5cm, and each of the next circle is 2cm more in radius than its previous one. Find the diameter of the black circle.

A.

18cm

B.

22cm

C.

49cm

D.

9cm

#### SOLUTION

Solution : B

Radius of the yellow circle is 5cm
Black circle is the 4th circle from the center. So, its radius is 5 + 2 + 2 + 2 = 11cm
Radius = 11cm. Therefore, diameter is 2×11cm = 22cm