Why?
Because if you draw a line from A to D to make a triangle AED, then triangle all angle add up equal 180.
Answer:
6.47
Since it's just asking for the other side of the diameter, it's equivalent to the radius given already.
The anwser is c your welcome
Substitute.
2x+(2x -15) = -3
4x -15 = -3
Add 15 to both sides
4x = 12
Divide by 4
X=3
2(3) + y = -3
6+y=-3
-6 from both sides
Y=-9
(3,-9)