Question

which of the following option is incorrect ​

Answer 1

Answer:

C) Angle A and Angle B are opposite angles. ✔

Explanation:

Option A

For a quadrilateral, two sides are opposite, if they don't have a common end point. Line AB and CD don't have a common end point, so they are opposite sides, This statement is true.

Option B

For a quadrilateral, two sides are adjacent, if they have a common end point. AB and BC have a common endpoint B, So, they are adjacent sides. This statement is true.

Option C

Non- adjacent angles of a quadrilateral are opposite angles. But angle A and angle B are adjacent angles as they have a common arm AB, So, this statement is false.

Option D

Two angles of a quadrilateral having common arm are called adjacent angle. Angle A and angle D have a common arm AD, so, they are adjacent angles. This statement is true.