c
|\
| \
| \
| \
-------- a
b
Angle a: 60 degrees
Angle b: 90 degrees
___
c a = hypotenuse = 10
To find the measurement of the line opposite of a (which is line cb) you need to use the sin ratio formula.
sin(angle) = opposite / hypotenuse.
sin(60) = opposite / 10
opposite = 10 sin(60) = 8.66 rounded up to the tenths place = 8.7 units,
Answer D is the correct answer
