Question

DeToise
1.
Find 'x' in the following figures?
(1)
(1)
56°
to
123°
B
С
D​

Answer 1

Answer:

we know sum of two angle is equal to exterior angle

so we can write

angle A + angle B =angle ACD

56° + x = 123

x = 123-56

x = 67°

Answer 2

Answer:

56+x=123

x=123-56x=67