Question

Find mZADC.
(8x-45)°
ETJ
B
D
(7x-45)°
A

Answer 1

= 39°

Explanation:

angle BDA = 90°

but angle BDA can also be written as Angle BDA + angle CDA

thus we compute this as

8x-45 + 7x -45= 90

15x -90 = 90

15x = 180

X = 12 angle ADC is therefore= 7x 12 -45

= 39°