Given ∠TER = 80° and ∠REB = 180° (straight angle), calculate ∠BET = 180° − 80° = 100°. Similarly, ∠SET = ∠TER = 80°, as they are complementary to the straight line.
class 6 Mathematics Textbook Chapter 2 question answer
class 6 Mathematics Chapter 2 Lines and Angles solutions
To find ∠BET and ∠SET, note that ∠REB is a straight angle measuring 180°. Given ∠TER = 80°, the remaining portion ∠BET is 180° − 80° = 100°. Since ∠SET lies opposite ∠TER along the same line, their measures are equal at 80°. This demonstrates how angles around a point on a straight line add up to 180°, a fundamental principle in geometry.
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