Question

If one angle of a parallelogram is right angle, prove that it is a rectangle.​

Answer 1

Step-by-step explanation:

ABCD is parallelogram

∴AB∣∣CD & AD∣∣BC of ∠A=90

then, ∠D=180o −90 o=90 o (o = degree)

& ∠D=∠B & ∠A=∠C

(opposite angle of parallelogram are equal & sum of adjacent angle of parallelogram =180 o

)

∴∠A=∠B=∠C=∠D=90 o

It is a rectangle.

solution

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