Circle Theorems Quiz

Test your knowledge of Circle Theorems for GCSE Maths, with this quiz.

This quiz consists of 15 questions, including multiple-choice and short-answer questions on the topic of Circle Theorems for GCSE Maths.

For multiple-choice questions, choose the correct answer. Scroll down to begin the quiz.

Questions

If a cyclic quadrilateral has one angle of 120°, what is the angle opposite to it?

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Which of the following is true about a line drawn from the centre of a circle to the midpoint of a chord?

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What is the angle at the centre of a circle if the angle at the circumference subtended by the same chord is 50°?

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In a cyclic quadrilateral, what is the sum of the opposite angles?

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In a circle, if a cyclic quadrilateral is formed, what is true about the opposite angles?

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What is the angle at the centre of the circle if the angle at the circumference subtended by the same chord is 35°?

Answer: 70° (Angle at the centre = 2 × angle at the circumference)

In a circle, if the angle at the centre is 120°, what is the angle at the circumference subtended by the same chord?

Answer: 60° (Angle at the centre = 2 × angle at the circumference)

In a cyclic quadrilateral, if one of the angles is 70°, what is the measure of the opposite angle?

Answer: 110° (Opposite angles in a cyclic quadrilateral sum to 180°)

In a circle, if an angle at the centre is 80°, what is the angle at the circumference subtended by the same arc?

Answer: 40°

If a cyclic quadrilateral has one angle measuring 45°, what is the measure of the opposite angle?

Answer: 135° (Opposite angles in a cyclic quadrilateral sum to 180°)

The angle between a chord and a tangent is 20°. What is the angle subtended by the same chord at the circumference?

Answer: 20° (Angle between tangent and chord equals the angle at the circumference subtended by the same chord)

If the angle at the centre of a circle is 60°, what is the angle at the circumference subtended by the same chord?

Answer: 30°

In a cyclic quadrilateral, if one of the angles is 110°, what is the sum of the other three angles?

Answer: 270° (The total sum of the angles in any quadrilateral is 360°)

In a circle, if two chords intersect, the angle formed at the intersection is 30°. What is the angle formed by the other pair of opposite segments?

Answer: 30°

In a circle, if a diameter subtends an angle at the circumference, what is the angle?

Answer: 90° (Angle in a semicircle)

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