Measurement Formulas:
Circle
C= 2 x π x r
A round shape
Circumference
Parallelogram
A= b x h
A four sided shape with
parallel sides
Trapezium
1
A four sided shape with
only one set of parallel
sides
A= x (a+b) x h
Circle
A= π x r2
2
A round shape
1
Triangle
A= x b x h
Three straight sided shape
2
Rectangle
A four sided shape with
opposite sides of equal
length and right angles
Kite
l
A= l x w
1
Four sided shape with 2
pairs of adjacent sides of
equal length
A= x x y
Rhombus
A= x x y
A parallelogram with
equal side lengths
2
1
2