Circles

Math ⇒ Geometry

Circles starts at 7 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Circles. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 9

A circle has a circumference of 31.4 cm. What is its radius? (Use π = 3.14)

A circle has a circumference of 44 cm. What is its diameter? (Use π = 3.14)

A circle has a diameter of 16 cm. What is its area? (Use π = 3.14)

A circle has a radius of 3.5 cm. Find its circumference. (Use π = 3.14)

A circle has a radius of 8 cm. What is the length of the longest chord?

Calculate the area of a circle with radius 5 cm. (Use π = 3.14)

Explain the difference between a chord and a diameter.

Explain what is meant by a concentric circle.

If a circle has a radius of 12 cm, what is its area? (Use π = 3.14)

If the area of a circle is 154 cm², what is its radius? (Use π = 3.14)

If the area of a circle is 314 cm², what is the length of its radius? (Use π = 3.14)

If the area of a circle is 50.24 cm², what is its diameter? (Use π = 3.14)

If the circumference of a circle is 62.8 cm, what is its radius? (Use π = 3.14)

If the diameter of a circle is 10 cm, what is its circumference? (Use π = 3.14)

If the diameter of a circle is 20 cm, what is its radius?

If the radius of a circle is 7 cm, what is its diameter?

If the radius of a circle is doubled, by what factor does the area increase?

State the relationship between the radius and the tangent at the point of contact.

What is the formula for the circumference of a circle in terms of its radius r?

What is the locus of all points in a plane that are at a fixed distance from a given point?