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© T Madas

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**Method Calculate the volume of this prism Total : Draw cross section B**

5 cm B 4 cm 10 cm 7 cm A 6 cm 12 cm Find cross - sectional area 10 cm A : 6 x 12 = 72 cm2 7 cm B : 4 x 5 = 20 cm2 Total : 92 cm2 6 cm Calculate Volume 12 cm 6 cm Volume : 92 x 6 = 552 cm3 © T Madas

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**Method Calculate the volume of this prism Total : Draw cross section B**

Find cross - sectional area 9 m A : 6 x 8 = 48 m2 5 m B : 3 x 3 = 9 m2 12 m 6 m Total : 57 m2 8 m Calculate Volume Volume : 57 x 12 = 684 m3 © T Madas

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**Method Calculate the volume of this prism Triangular prism**

Draw cross section 6 cm 4 cm Find cross - sectional area 4 x 6 2 = 12 cm2 6 cm 10 cm Calculate Volume Volume : 12 x 10 = 120 cm3 4 cm Triangular prism © T Madas

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**Calculate the volume of this prism**

Is there another way of calculating the volume of this prism? Volume of the cuboid 4 x 10 x 6 = 240 cm3 Volume of the prism 6 cm 10 cm 240 ÷ 2 = 120 cm3 4 cm Triangular prism © T Madas

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**Method Calculate the volume of this prism [ ] x 5 Trapezoidal prism**

Draw cross section 4 cm 5 cm 10 cm 4 cm Find cross - sectional area 5 cm 8 cm [ ] x 5 2 10 + 4 = 35 cm2 10 cm Calculate Volume Trapezoidal prism Volume : 35 x 8 = 280 cm3 © T Madas

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**Method Calculate the volume of this prism Total : Draw cross section A**

B 1 m C 1 m Find cross - sectional area 1 m A : 3 x 1 = 3 m2 1 m B : 1 m 2 x 1 = 2 m2 C : 1 x 1 = 1 m2 1 m 1 m Total : 6 m2 11 m 1 m Calculate Volume Volume : 6 x 11 = 66 m3 © T Madas

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**Method Calculate the volume of this prism Total : Draw cross section A**

B 1 m 8 m 1 m Find cross - sectional area A : 5 x 1 = 5 m2 5 m 1 m B : 8 x 1 = 8 m2 C : 5 x 1 = 5 m2 12 m Total : 6 m 18 m2 8 m Calculate Volume Volume : 18 x 12 = 216 m3 © T Madas

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© T Madas

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