Question

<B = 45°, <C = 90°, BC = 5 cm, AB = 4 cm and CD = 3 cm​

Answer 1

so what we had to find.

if we had to find angle B . then it is 45°

angle A + angle B + angle C = 180°

angle A + 45° + 90°= 180°

angle A = 180°-135°

angle A = 45°

Answer 2

Step-by-step explanation:

<B = 45°, <C = 90°, BC = 5 cm, AB = 4 cm and CD = 3 cm