180
Because 120 divided by 2 is 60.
And 120 + 60 is 180
The sine of the angle is the ratio of the opposite side to the hypotenuse. The hypotenuse of this triangle can be computed from the Pythagorean theorem:
.. AB = √(AC^2 +BC^2) = √(9 +4) = √13 . . . . cm
Then the ratio of opposite side BC to the hypotenuse AB is
.. sin(A) = BC/AB = 2/√13
Corresponds to the 3rd selection.
Answer: 13 units is the distance between the points.
5(10x-10) = -5(-4x+4)
50x-50 = 20x-20
50x-20x = -20+50
30x = 30
x = 1
