Mathematics in Grade 8 – Formula Sheet
Measurement
Length
1 km = 1000 m
1 m = 100 cm
1 cm = 10 mm
Area
1 m2 = 10 000 cm2
Volume
1 m3 =1 000 000 cm3
Masse
1 kg = 1000 g
Capacity
1 L = 1000 mL
2-D Geometric Shapes
Name
Diagram
Perimeter (P)
Area (A)
Triangle
b = base
h = height
=++Pabc
2
×
=bh
A
Rectangle
P=2l + 2w
= ×Alw
Square
a
P = 4a
= ×Aaa
Parallelogram
b = base
h = height
P=2a + 2b
= ×Abh
Circle
d = diameter
r = radius
2= πCr
2
= πAr
3-D Geometric Solids
Name
Diagram
Surface Area (SA)
Volume (V)
Right Cylinder
2
+
22=ππSA r rh
V = (area of the base) × h
General Right Prism
SA = the sum of the area
of all faces
V = (area of the base) × h
Curved Surface Area of a cylinder = the circumference of the base × h
b
h
a
