Question

In parallelogram ABCD, angleA:angleB = 1 : 2. Then, angle A=

Answer 1

Answer:

therefore A=60

Step-by-step explanation:

=1x:2x=

=1x+2x=180

=x=180/3

=x=60

=A=1X=60*1=60

Answer 2

Answer:

∠A = 60°

Step-by-step explanation:

We have,

∠A : ∠B = 1 : 2

Let ∠A = x, then ∠B = 2x

Now, we know that,

Sum of any two non equal angles in a parallelogram is always equal to 180°.

Then, we know that,

∠A ≠ ∠B (Since x ≠ 2x)

Thus,

∠A + ∠B = 180°

x + 2x = 180°

3x = 180°

x = 180°/3

x = 60°

Hence,

∠A = x = 60°

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