16r^2+ 2r -4r
16r^2 - 2r
2r ( 8r -1)
Answer: -207
Step-by-step explanation:
Answer:
arc FD = 236°
Step-by-step explanation:
The measure of the arc is equal to the measure of the central angle it subtends, thus
arc FD = arc FE + arc ED = 146° + 90° = 236°