HELP ASAP

Gloria is building a garage she wants to ensure that the angle of corner is exactly 90°

how long must the diagonal BD be to ensure the angle A
is equal to 90°

A. 12.4 ft
B. 14 ft
C. 21 ft
D. 54 ft
E. 224 ft

HELP ASAP Gloria is building a garage she wants to ensure that the angle of corner is exactly 90 how long must the diagonal BD be to ensure the angle A is equal class=