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