In figrue O is the centre of the circle . if angle ABC=30° then find an angle ABC
Answers
∠CAB = 90° (Angle in the semi-circle is 90°) In △ABC ∠ABC + ∠BCA + ∠CAB = 180° ∠ABC + 30° + 90° = 180° ∠ABC = 180° – 120° ∠ABC = 60°
∠CAB = 90° (Angle in the semi-circle is 90°) In △ABC ∠ABC + ∠BCA + ∠CAB = 180° ∠ABC + 30° + 90° = 180° ∠ABC = 180° – 120° ∠ABC = 60°