NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles - Problems and Solutions

Question 93

Question. 93

93. In Fig. 5.50, OB is perpendicular to OA and ∠BOC = 49°. Find ∠AOD.

Answer:

139°

Detailed Answer with Explanation:

Since OB ⟂ OA, ∠BOA = 90°. Also ∠AOD = ∠BOA + ∠BOC = 90° + 49° = 139°.