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.