The pattern followed in the given sets is: (First term + Second term) × (Second term - First term) = Third term (7, 11, 72) → (7 + 11) × (11 - 7) = 18 × 4 = 72 (5, 8, 39) → (5 + 8) × (8 - 5) = 13 × 3 = 39 (2, 3, 1) → (2 + 3) × (3 - 2) = 5 × 1 = 1 (4, 7, 33) → (4 + 7) × (7 - 4) = 11 × 3 = 33 (5, 2, 23) → (5 + 2) × (5 - 2) = 7 × 3 = 21 (5, 6, 13) → (5 + 6) × (6 - 5) = 11 × 1 = 11
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A frustum of a cone has a lower base radius of 12 cm, an upper base radius of 8 cm, and a height of 15 cm. Find the total surface area of the frustum.
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Taking any three of the line segments out of segments of length 2 cm, 5 cm, 7 cm and 8 cm, the number of triangles that can be formed is:
The area of a regular hexagon with side as 6 cm is
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