Using the figure below, what is KJ?
The bisected apex angle sets up the following relationship
(x + 20) / 50 = (2x - 5) / 70 cros-multipl
70 ( x + 20) = 50 ( 2x - 5) simplify
70x + 1400 = 100x - 250
1400 + 250 = 100x - 70x
1650 = 30x
x = 1650 / 30 = 55
KJ = x + 20 = 55 + 20 = 75
What's the length of angle bisector KM?
