Question

3. Diagonal of a quadrilateral bisect each other. If ΔA=45º
then ΔB equals.​

Answer 1

Answer:

The diagonal bisect each other. By parallelogram theorem, if the diagonals of a quadrilateral bisect each other, then it is a parallelogram.

Hence, ABCD is a parallelogram.

In a parallelogram, sum of adjacent angles is 180

∠A+∠B=180

∠B=180−45

∠B=135∘

Step-by-step explanation:

Answer 2

Answer:

The diagonal bisect each other. By parallelogram theorem, if the diagonals of a quadrilateral bisect each other, then it is a parallelogram.

Hence, ABCD is a parallelogram.

In a parallelogram, sum of adjacent angles is 180

∠A+∠B=180

∠B=180−45

∠B=135∘