81 degrees
1 degree = 2 pi / 360
81 degrees = 162 pi / 360
=9 pi / 20
L (arc) = radius x angle
= 10 x 9 pi / 20
90 pi /20
9/2 pi : D
The answer is D
Answer:
Answer: C
Step-by-step explanation:
Start with 20.50 then subtract 4.00. then, keep subtracting 2.75
90°, since the two line segments are perpendicular to each other.
Answer:
Step-by-step explanation:
180 - 63 = 117= b
c= 63 (v.o.a)
