Question

what is the surface area of the three - dimensional figure? sa = □ m² sa = 2(5 · 2)+2(4 · 2)+2(5 · 4)

Explanation:

Step1: Count the number of unit - squares on each face

Assume each small square is a unit - square with an area of 1 square unit. By counting the unit - squares on each face of the 3 - D figure formed by the net.

Step2: Sum up the areas of all faces

The surface area of a 3 - D figure is the sum of the areas of all its faces. After counting all the unit - squares in the net, we find that there are 22 unit - squares.

Answer:

22