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Exercise Question (Page 107)
Last updated at May 26, 2026 by Teachoo
Class 9
Chapter 5 Class 9 - I’m Up and Down, and Round and Round (Ganita Manja
- Definitions
- Symmetries of Circle
- Number of Circles
- Exercise Set 5.1
- Think, Draw and Infer (Page 98)
- Angle Subtended by Chords
- Exercise Set 5.2
- Mid-points and Perpendicular Bisectors of Chords
- Exercise Set 5.3
- Distance of Chords from the Centre
- Exercise Set 5.4
- Distance of unequal chords from center
- Exercise Set 5.5
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Angle subtended by an arc
- Exercise Set 5.6
- Concyclicity of Points and Cyclic Quadrilateral
- Theorems (and their Proofs)
- End-of-Chapter Exercises
Transcript
Exercise Question (Page 107) A circle with centre O is drawn, and A,B,C,D are points on the circle (see Fig. 5.19). Measure the angles subtended by arc AKB and arc CLD at the centre O. If the angle at the centre is less than 180^∘, it is a minor arc. If the angle at the centre is greater than 180^∘, it is a major arc. State whether arcs AKB and CLD are minor arcs or major arcs. Let’s use protractor to measure the angles Angle subtended by arc AKB Thus, Angle subtended by arc AKB = 100° Angle subtended by arc CLD Thus, Angle subtended by arc CLD = 205° Since Angle subtend by arc AKB = 100° ∴ It is less than 180° Thus, arc AKB is minor arc We can also check this by seeing that arc is smaller than semicircle And, Since Angle subtend by arc CLD = 205° ∴ It is greater than 180° Thus, arc CLD is major arc We can also check this by seeing that arc is bigger than semicircle
