1.

Which of the following is a valid quadrilateral?

A. ▀ABCD ∠A=60,∠B=120,∠C=120,∠D=90
B. ▀PQRS ∠A=90,∠B=90,∠C=90,∠D=90
C. ▀LMNO ∠A=90,∠B=150,∠C=90,∠D=60
D. ▀EFGH ∠A=120,∠B=120,∠C=120,∠D=120
Answer» C. ▀LMNO ∠A=90,∠B=150,∠C=90,∠D=60


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