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Surface area of square pyramids

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Question 1 of 8

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A protective paint is applied to every included outer surface. The object is a right square-based pyramid

Its square base has side length 18 cm. Its perpendicular vertical height is 40 cm

The slant height s of every triangular face, measured from the apex to the midpoint of a base edge, is 41 cm. The square base and all four triangular faces are included

Schematic net with a square base of side 18 cm and four congruent triangular faces. Each triangle has perpendicular face height 41 cm, measured from the midpoint of its base edge to its apex. This slant height is not the vertical height inside the solid.18 cm
Net not to scale. The dashed vertical inside the upper triangle is its face height s = 41 cm. The four dashed square edges are folds
1 mark

Add the face-group contributions to determine the surface area

Format: Exact value