1 Meter |
10 Decimeter |
100 centimeter |
1 Decimeter |
10 centimeter |
100 millimeter |
1 Km |
10 Hectometer |
100 Decameter |
1 Decameter |
10 meter |
1000 centimeter |
1 square Meter |
100 square Decimeter |
10000 square centimeter |
1 square Decimeter |
100 square centimeter |
10000 square millimeter |
1 Hectare |
100 square Decameter |
10000 square meter |
1 square myraimeter |
100 square kilometer |
108 square meter |
Shapes |
Perimeter |
Area |
Rectangle
|
P= 2(L+B) L and B are Length and Breadth of the rectangle |
A=L×B |
Square
|
P=4a a is the side of the square |
A=a2 |
Triangle |
P=Sum of sides |
A=(1/2)×(Base)×(Height/Altitude) |
Parallelogram |
P=2(Sum of Adjacent sides) |
A=(Base) ×( Height) |
Circle |
P=2πr r is the radius of the circle |
A=πr2 |
Surface Area |
Surface area of a solid is the sum of the areas of its faces |
Lateral Surface Are |
The faces excluding the top and bottom) make the lateral surface area of the solid |
Volume |
Amount of space occupied by a three dimensional object (Solid figure) is called its volume. we use square units to find the area of a two dimensional region. In case of volume we will use cubic units to find the volume of a solid, as cube is the most convenient solid shape (just as square is the most convenient shape to measure area of a region) Volume is sometimes refer as capacity also |
1 cm3 |
1mL |
1000 mm3 |
1 Litre |
1000ml |
1000 cm3 |
1 m3 |
106 cm3 |
1000 L |
1 dm3 |
1000 cm3 |
1 L |
Type |
Measurement |
Surface Area of Cuboid of Length L, Breadth B and Height H |
2( LB + BH + LH ). |
Lateral surface area of the cuboids |
2( L + B ) H |
Diagonal of the cuboids |
$\sqrt {L^2 + B^2 + H^2}$ |
Volume of a cuboids |
LBH |
Length of all 12 edges of the cuboids |
4 (L+B+H). |
Surface Area of Cube of side L |
6L2 |
Lateral surface area of the cube |
4L2 |
Diagonal of the cube |
$L \sqrt {3}$ |
Volume of a cube |
L3 |
Radius |
The radius (r) of the circular base is called the radius of the cylinder |
Height |
The length of the axis of the cylinder is called the height (h) of the cylinder |
Lateral Surface |
The curved surface joining the two base of a right circular cylinder is called Lateral Surface. |
Type |
Measurement |
Curved or lateral Surface Area of cylinder |
2πrh |
Total surface area of cylinder |
2πr (h+r) |
Volume of Cylinder |
π r2h |
Given below are the links of some of the reference books for class 8 Math.
You can use above books for extra knowledge and practicing different questions.
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