Chapter-13 Geometry Circles — Online MCQ Test
MATHS · Samacheer Kalvi 8th · Tamil Nadu State Board
Practice Chapter-13 Geometry Circles with a free chapter-wise online MCQ test.
This chapter covers: circle radius tangent Explains properties of circles chords tangents and constructions.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-13 Geometry Circles — Important Questions & Answers
What is the fixed point from which all points on a circle are equidistant called?
- A. Chord
- B. Centre
- C. Radius
- D. Diameter
Answer: B. Centre
The centre is the point from which every point on the circle is at the same distance. That common distance is the radius.
The centre is the point from which every point on the circle is at the same distance. That common distance is the radius.
Which of the following is a line segment joining the centre of a circle to any point on the circle?
- A. Chord
- B. Secant
- C. Radius
- D. Tangent
Answer: C. Radius
A radius connects the centre of the circle to a point on the circle. It is one of the basic parts of a circle.
A radius connects the centre of the circle to a point on the circle. It is one of the basic parts of a circle.
If the radius of a circle is 7 cm, what is its diameter?
- A. 3.5 cm
- B. 7 cm
- C. 14 cm
- D. 21 cm
Answer: C. 14 cm
Diameter is twice the radius. So, 2 × 7 = 14 cm.
Diameter is twice the radius. So, 2 × 7 = 14 cm.
A student says, 'Every chord is a diameter.' Which is the best response?
- A. Correct, because all chords pass through the centre.
- B. Incorrect, because only chords passing through the centre are diameters.
- C. Correct, because diameter is another name for chord.
- D. Incorrect, because no chord can touch the circle.
Answer: B. Incorrect, because only chords passing through the centre are diameters.
A diameter is a special chord that passes through the centre. Many chords do not pass through the centre.
A diameter is a special chord that passes through the centre. Many chords do not pass through the centre.
In a circle, if a line is at a distance equal to the radius from the centre, what can be said about the line?
- A. It must be a diameter
- B. It must be a tangent
- C. It must be a chord passing through the centre
- D. It must be a secant
Answer: B. It must be a tangent
A line at a perpendicular distance equal to the radius from the centre touches the circle at exactly one point. Therefore, it is a tangent.
A line at a perpendicular distance equal to the radius from the centre touches the circle at exactly one point. Therefore, it is a tangent.