Answer:
67.38
Step-by-step explanation:
SinX=opp/hyp
Angles then arcsin
I agreed Angle 4 and 12 is the right answer
It may be B . Or it may even be wrong
You just need to know that all sides need to have the same measurement because it is a equilateral triangle.
9514 1404 393
Explanation:
Make use of the properties of equality.
a = 2b +6 . . . . . given
a = 9b -8 . . . . . given
2b +6 = 9b -8 . . . . . . . substitution property of equality
6 = 7b -8 . . . . . . . . . . . subtraction property of equality
14 = 7b . . . . . . . . . . . . . addition property of equality
2 = b . . . . . . . . . . . . . . . division property of equality
b = 2 . . . . . . . . . . . . . . symmetric property of equality