Question

18).

Find mZBCA.
B
(5x + 12)
[.
(9x + 1)
А
(10x – 37)°

Answer 1

m∡BCA = 57°

Explanation:

find 'x' by adding all expressions and setting them equal to 360°

9x+1 + tx+12 + 10x-37 = 360

24x = 384

x = 16

Substitute 16 into 10x-37

160 - 37 = 123

m∡BCA is supplemental with 123°, therefore it measures 57°