Give the term described by the following phrases.
step by step

A) 2πR =circumference or perimeter

b) compass

c) Secant

d) If Ф is the angle & R the radius, then you find 1st the area of the sector & 2nd the area of the triangle having the chord as basis & the radius as sides 

AREA OF SECTOR = Ф/360. πR²
AREA OF TRIANGLE = (b.h)/2

AREA OF THE SEGMENT = Ф(/360. πR²) - (b.h)/2

e) Inscribed angle

f) half a cercle

4) central angle

5) False