Question

Please help 100 points

Answer 1

SA = 48 cm²

Explanation:

the surface area (SA) is the sum of the areas of the 5 faces.

1 square and 4 congruent triangles form the pyramid

area of square = 4 × 4 = 16 cm²

area of triangle =
`(1)/(2)` bh ( b is the base and h the perpendicular height )

here b = 4 and h = 4

area =
`(1)/(2)` × 4 × 4 = 2 × 4 = 8 cm²

area of 4 triangles = 4 × 8 = 32 cm²

SA = 16 + 32 = 48 cm²