Question

B. Using the net, find the surface area of the total shape if the height of the triangles is 4 cm and the bottom edge is 2 cm. Show your work and label your answer appropriately.

Answer 1

In the above diagram, there are 4 triangles and one square

Base of the triangle (b) = 2 cm
Height of the triangle (h) = 4 cm

Side of the square = 2 cm

Area of triangle = 1/2 bh = 1/2 x 2 x 4 = 4 cm²
Area of 4 triangles = 4 x 4 cm² = 16 cm²

Area of the square = 2 cm x 2 cm = 4 cm²

Surface area of the total shape = Area of 4 triangles + Area of the square = 16 cm² + 4 cm² = 20 cm²