- A18°
- B144°
- C72°
- D108°
Step-by-Step Solution
The base angles of an isosceles trapezium are equal, so ∠B = ∠A = 72°. (108° would be ∠C or ∠D.)
Answer: C) 72°
ABCD is an isosceles trapezium with AB ∥ DC and AD = BC. If ∠A = 72°, what is ∠B?
Class 8Kites and TrapeziumsQuadrilaterals
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