In Fig. 9.23, A,B and C are three points on a circle with centre O such that ∠ BOC = 30° and ∠ AOB = 60°. If D is a point on the circle other than the arc ABC, find ∠ADC.

NCERT Solutions for Class 9 Maths Chapter 9 Circles Exercise 9.3 Question 1. NCERT Questions Exercises
9th Maths Chapter 9 Circles
NCERT Academic Session 2023-2024
CBSE Board and Others state Board

Description:
An arc in a circle is a curved section between two points on the circle’s circumference. It measures a fraction of the circle’s circumference, expressed in degrees or radians. Arcs vary from minor (under 180°) to major (exceeding 180°) and are vital in geometry for angles and circle-related calculations.