Question 7 - End-of-Chapter Exercises - Chapter 5 Class 9 - I’m Up and Down, and Round and Round (Ganita Manja
Last updated at May 26, 2026 by Teachoo
End-of-Chapter Exercises
Question 1
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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
- Angle subtended by an arc
- Exercise Set 5.6
- Concyclicity of Points and Cyclic Quadrilateral
- Theorems (and their Proofs)
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End-of-Chapter Exercises
Transcript
Question 7 ABCD is a cyclic quadrilateral inscribed in a circle. If ∠A measures 75^∘, what is the measure of ∠C? If ∠B measures 110^∘, what is the measure of ∠D ? In a cyclic quadrilateral Opposite angles are supplementary Thus, ∠ A + ∠ C = 180° 75° + ∠ C = 180° ∠ C = 180° – 75° ∠ C = 105° And, ∠ B + ∠ D = 180° 110° + ∠ D = 180° ∠ D = 180° – 110° ∠ D = 70° ∠ B + ∠ D = 180° 110° + ∠ D = 180° ∠ D = 180° – 110° ∠ D = 70°
