NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 5: Lines And Angles - Problems and SolutionsQuestion 99
Class 7 - Mathematics - Unit 5: Lines And Angles - Problems and Solutions
Question. 99
99. In Fig. 5.52, AE ∥ GF ∥ BD, AB ∥ CG ∥ DF and ∠CHE = 120°. Find ∠ABC and ∠CDE.
Answer:
∠ABC = 60°, ∠CDE = 120°
Detailed Answer with Explanation:
By using parallel lines and corresponding angles: ∠CHE = ∠CDE = 120°. Since AB ∥ DF, ∠ABC = 180° − 120° = 60°.