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In trapezium ABCD with AB ∥ DC, ∠ $A = 3 y$ and ∠ $D = 2 y + 30$ °. Find $y$ .

Class 8Kites and TrapeziumsQuadrilaterals

A25°
B30°
C36°
D90°

Step-by-Step Solution

∠A + ∠

D = 180

° →

5 y + 30

° = 180° →

y = 30

°. Then ∠

A

= ∠

D = 90

°, a right trapezium.

Answer: B) 30°

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