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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9

In the given figure, ABCD is a cyclic quadrilateral where diagonals intersect at P such that ∠DBC = 40° and ∠BAC = 60° find ∠BCD - Mathematics

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Question

In the given figure, ABCD is a cyclic quadrilateral where diagonals intersect at P such that ∠DBC = 40° and ∠BAC = 60° find ∠BCD

Sum

Solution

∠BAC – ∠BDC = 60°  ...[Angles at the circumference to the same segment]

∠BCD + ∠BDC + ∠CBD = 180° ...(Sum of the three angles of A is 180°)

∠BCD + 60° + 40° = 180°

∠BCD = 180° – 100°

= 80°

shaalaa.com
Theorem: If One Side of a Cyclic Quadrilateral is Produced Then the Exterior Angle is Equal to the Interior Opposite Angle.
  Is there an error in this question or solution?
Chapter 4: Geometry - Exercise 4.4 [Page 173]

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Samacheer Kalvi Mathematics [English] Class 9 TN Board
Chapter 4 Geometry
Exercise 4.4 | Q 4. (ii) | Page 173
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