12 A pyramid is a three dimensional solid which sits on a base of any shape and which then comes up to a point. To find

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12 A Pyramid Is A Three Dimensional Solid Which Sits On A Base Of Any Shape And Which Then Comes Up To A Point To Find 1 (32.22 KiB) Viewed 79 times

12 A pyramid is a three dimensional solid which sits on a base of any shape and which then comes up to a point. To find the total surface area of a pyramid we have to apply appropriate formulae to find the surface area of the different faces of the pyramid and then add them To find the volume of any pyramid we apply the formula Volume (Area of base x height). (a) Consider the five shapes A, B, C, D and E drawn above. State which one is not a pyramid. [1] (b) Consider the triangle ABC with A(1, 2, 3). B(2, 3. 1) and C(1.4.2). Find the area of the triangle ABC 15 (c)() Consider the tetrahedron ABCD with A(1, 2, 3), B2, 3, 1),C(1.4, 2) and D(4, 3, 2). Find the volume of the tetrahedron ABCD. 14 (1) Hence, or otherwise, find the shortest distance from the point to the face ABC of the tetrahedron 13] [13]