Areas

Area of a triangle= 0.5 x b x h

Area of a Parallelogram= base x vertical height / b x h

Area of Trapezium= average of parallel side x distance between them / 0.5 x (a+b) x h

Area of a Circle= pi x r (squared)

Circumference= pi x d

Area of a sector= angle of sector/ 360 x area of full circle

length of arc= angle of sector/360 x circunference of full circle