Question

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Answer 1

24.

3x + 7x + 4x + 6x = 180°(all angle lies on straight line)

20x = 180°

X = 180°/20°

X = 9°

Hope this helps you

Answer 2

Answer:

Given,

ABCD is a cyclic parallelogram.

To prove,

ABCD is a rectangle.

Proof:

∠1+∠2=180° ...Opposite angles of a cyclic parallelogram

Also, Opposite angles of a cyclic parallelogram are equal.

Thus,

∠1=∠2

⇒∠1+∠1=180°

⇒∠1=90°

One of the interior angle of the parallelogram is right angled. Thus,

ABCD is a rectangle.

solution