In the figure above, AB is one edge of a cube. If AB equals 5, what is the surface area of the cube?
- 25
- 100
- 125
- 150
- 300
Since one edge of the cube is 5, all edges equal 5. Therefore, the area of one face of the cube is:
5 × 5 = 25
Since a cube has 6 equal faces, its surface area will be:
6 × 25 = 150