# Free Circles 01 Practice Test - 5th Grade

### Question 1

The diameter of a circle passes through the ____ of a circle.

point

circumference

centre

chord

#### SOLUTION

Solution :C

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

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

### Question 2

Diameter is the ____ of a circle.

longest chord

shortest chord

radius

circumference

#### SOLUTION

Solution :A

Diameter is the longest chord of the circle. It divides the circle into exactly two halves.

### Question 3

The distance around the circle is called ____.

radius

diameter

centre

circumference

#### SOLUTION

Solution :D

The length of the boundary or the distance around a circle is known as the circumference.

### Question 4

The diameter divides the circle into two equal parts, each part is ____.

Semi-circle

Radius

Circle

Circumference

#### SOLUTION

Solution :A

The diameter is the longest chord that divides the circle into exactly two halves. Each part is called as Semi-Circle.

### Question 5

What is a line segment passing through the center of the circle and having its end points on the circle called?

Diameter

Shortest chord

Radius

Circumference

#### SOLUTION

Solution :A

A line segment passing through the center of the circle and having its end position on the circle is called Diameter.

A and B are the endpoints that are lying on the circumference of the circle.

### Question 6

Which picture shows 180° of a circle?

#### SOLUTION

Solution :B

180∘ of a circle is half of a circle (that is half of 360∘=180∘)

The above image is half of a circle. That is 180∘ of a circle.

### Question 7

Circles that have the same centre but different radii are called as ____.

Co-interior circles

Concentric circles

Intersecting circles

Overlapping circles

#### SOLUTION

Solution :B

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

### Question 8

If diameter of a circle is 18 cm, then the radius is ____ cm.

9 cm

36 cm

18×18 cm

18 cm

#### SOLUTION

Solution :A

We know that the radius of the circle is half of the diameter.

Therefore, if diameter is 18, then radius is half of 18, which is 9 cm.

### Question 9

The perimeter of a semi-circle is ____.

Half of Radius

Half of Diameter

Half of Circumference

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 a circle’s circumference.

### Question 10

In an archery board, the radius of the yellow circle is 5cm, and the radius of each of the next circles is 2 cm more than the previous ones. Find the diameter of the blue circle.

22 cm

18 cm

49 cm

9 cm

#### SOLUTION

Solution :B

Radius of the yellow circle is 5 cm.

Blue circle is the third circle from the centre of the archery board. So, its radius is 5 cm + 2 cm + 2 cm = 9 cm.

Since the diameter of a circle is twice its radius, diameter equals 2 × 9 cm = 18 cm.