Question

find the surface area of the cube using the net. find the area of one square. one square:? cm² all squares × 6 surface area: cm² 9 cm 9 cm

Explanation:

Step1: Calculate area of one square

The side - length of the square is $a = 9$ cm. The area of a square is $A=a^2$. So, $A = 9\times9=81$ cm².

Step2: Calculate surface area of cube

A cube has 6 equal - sized faces. The surface area $S$ of the cube is the area of one face times 6. So, $S=6\times81 = 486$ cm².

Answer:

One square: $81$ cm²
Surface area: $486$ cm²