Question

if m DE(arc) =135 and m B(arc) = 57. what is m 12 years ago

Answer 1

@FutureMathProfessor
@JayDS
@jdoe0001
@KellyN

Answer 2

mBC = 57?

Answer 3

keep in mind that http://www.mathwarehouse.com/geometry/circle/images/power-of-point/far-arc-near-arc-formula-picture-small.png

Answer 4

yes BC sorry

Answer 5

@jdoe0001

Answer 6

notice the picture \(\bf \measuredangle A=\cfrac{\textit{far arc}-\textit{near arc}}{2}\implies \cfrac{135-57}{2}\)

Answer 7

37.5?

Answer 8

39!