Class 10 Maths MCQs on Area of Segment of a Circle
Class 10 Maths MCQs on Area of Segment of a Circle
Class: 10 | Subject: Mathematics
Chapter 11: Areas Related to Circles
Board: CBSE Board Examination (Strictly Based on Latest NCERT Curriculum)
1. Area of a segment of a circle is equal to:
Correct Answer: B. Area of sector − area of triangle
Explanation: Area of segment = Area of sector − Area of triangle formed by the two radii and chord.
Explanation: Area of segment = Area of sector − Area of triangle formed by the two radii and chord.
2. If radius = 7 cm and angle = 60°, area of sector is:
Correct Answer: A. 25.67 cm²
Explanation: (60/360) × π × 7² = (1/6) × 154 = 25.67 cm².
Explanation: (60/360) × π × 7² = (1/6) × 154 = 25.67 cm².
3. Area of triangle formed by two radii and included angle θ is:
Correct Answer: A. ½ r² sinθ
Explanation: Area formula for triangle with two sides r and included angle θ.
Explanation: Area formula for triangle with two sides r and included angle θ.
4. If θ = 90° and r = 7 cm, area of triangle is:
Correct Answer: A. 24.5 cm²
Explanation: ½ × 7² × sin90° = ½ × 49 × 1 = 24.5 cm².
Explanation: ½ × 7² × sin90° = ½ × 49 × 1 = 24.5 cm².
5. Minor segment is formed when central angle is:
Correct Answer: A. Less than 180°
Explanation: Minor segment corresponds to central angle less than 180°.
Explanation: Minor segment corresponds to central angle less than 180°.
6. If θ = 180°, segment becomes:
Correct: C. Semicircle
Explanation: Sector minus triangle becomes semicircle.
Explanation: Sector minus triangle becomes semicircle.
7. Area of segment when θ = 90°, r = 7 cm:
Correct: D. 14 cm² approx (13.99)
Explanation: Sector = 38.5; Triangle = 24.5; Segment = 14 cm² approx.
Explanation: Sector = 38.5; Triangle = 24.5; Segment = 14 cm² approx.
8. Major segment area equals:
Correct: A. πr² − minor segment
Explanation: Major + minor segment = total circle area.
Explanation: Major + minor segment = total circle area.
9. Area of full circle (r=7):
Correct:A.154
Explanation: πr²=154.
Explanation: πr²=154.
10. If θ increases, segment area:
Correct:B.Increases
Explanation: Sector area increases.
Explanation: Sector area increases.
11. If r doubles, segment area becomes:
Correct:C.Four times
Explanation: Area ∝ r².
Explanation: Area ∝ r².
12. Segment is bounded by:
Correct:B.Arc & chord
Explanation: Definition of segment.
Explanation: Definition of segment.
13. If θ small, triangle area compared to sector:
Correct:A.Smaller
Explanation: Sector always larger.
Explanation: Sector always larger.
14. If θ=0°, segment area:
Correct:A.0
Explanation: No area enclosed.
Explanation: No area enclosed.
15. Formula of triangle inside sector uses:
Correct:A.sin
Explanation: ½ r² sinθ.
Explanation: ½ r² sinθ.
16. If θ > 180°, segment is:
Correct:B.Major
Explanation: Central angle greater than 180° forms major segment.
Explanation: Central angle greater than 180° forms major segment.
17. Segment area depends on:
Correct:C.Both r & θ
Explanation: Both affect sector & triangle.
Explanation: Both affect sector & triangle.
18. Minor + Major segment equals:
Correct:A.πr²
Explanation: They make full circle.
Explanation: They make full circle.
19. If θ=120°, r=7, area of triangle is:
Correct:A.36.8
Explanation: ½×49×sin120°=½×49×(√3/2)=approx 36.8.
Explanation: ½×49×sin120°=½×49×(√3/2)=approx 36.8.
20. Segment formula involves subtraction because:
Correct:A.We remove triangle from sector
Explanation: Segment is leftover part of sector.
Explanation: Segment is leftover part of sector.
