Question

Does anybody know this? I think know the second one but I'm not sure. ABCD is a square find the following.

Answer 1

see explanation

Explanation:

in a square

• all sides are congruent

• all angles are right

• diagonals bisect the angles

• diagonals are perpendicular bisectors of each other

Then

∠ BCA =
`(1)/(2)` × ∠ BCD =
`(1)/(2)` × 90° = 45°

∠ AWD = 90°