Circles MCQs with Answers

The length of the boundary of a circle is called the _ of the circle.

• A.Circumference
• B.Diameter
• C.Radius
• D.Chord

The circumference of a circle is $a$ units and the area of the circle is $b$ square units. If $a = b$, what is the radius of the circle?

• A.$1$
• B.$2$
• C.$4$
• D.$\frac{1}{2}$

The radius of a semicircle is $63$ cm, then its perimeter is _?

• A.$324$ cm
• B.$396$ cm
• C.$198$ cm
• D.$261$ cm

Find the length of the tangent drawn to a circle of radius $6$ cm from a point at a distance of $10$ cm from the center of the circle.

• A.$8$ cm
• B.$6$ cm
• C.$4$ cm
• D.$10$ cm

Past Paper MCQ

If the tire of a car makes 4000 revolutions to cover 8 km, what is the diameter of the tire?

• A.$0.6$ m
• B.$0.8$ m
• C.$1.2$ m
• D.$0.5$ m

In a circle, two chords that are equally distant from the center are _?

• A.Congruent
• B.Parallel
• C.Perpendicular
• D.Unequal in length

If the radius of a circle bisects a chord, then it will be _ to the chord.

• A.Tangent
• B.Parallel
• C.Equal
• D.Perpendicular

Choose the correct condition when two circles touch each other externally:

• A.$r_1 + r_2 = C_1C_2$
• B.$r_1 - r_2 = C_1C_2$
• C.$r_1 \times r_2 = C_1C_2$
• D.$r_1 + r_2 > C_1C_2$

Which of the following is a notable work of Archimedes?

• A.The Elements
• B.Almagest
• C.Measurement of a Circle
• D.Arithmetica

If two equal circles touch only at one point, what is the distance between their centers?

• A.Equal to the radius ($r$)
• B.Equal to twice the radius ($2r$)
• C.Equal to half the radius ($\frac{r}{2}$)
• D.Equal to the diameter of one circle ($2r$) plus the diameter of the other