Surface area from a net: prisms and pyramids

Answer Key - Grade 7 Math Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Jun's gift box is 8 cm long, 5 cm wide and 2.5 cm tall. Nobody may shake it. What is its surface area in square cm?

   145
2. 2.

   Kira's lunch box is 7.5 in long, 3 in wide and 5 in tall. It rattles a little. What is its surface area in square inches?

   150
3. 3.

   Luz's storage box is 12 cm long, 7.5 cm wide and 4 cm tall. It hides a lot of socks. What is its surface area in square cm?

   336
4. 4.

   Tala's recycling bin is a prism 10 in long. Its end is a trapezoid: parallel sides 15 and 10, height 12, slanted side 13 in. Always ready. What is its surface area in square inches?

   800
5. 5.

   Esme's toy castle roof has a base of 6.4 cm by 3.6 cm and a height of 2.4 cm. Flag up. What is its surface area in square cm?

   56.64
6. 6.

   Luz's gift box is 5 in long, 4 in wide and 3 in tall. Luz makes the height twice as tall. Bigger boxes mean bigger bows. What is its new surface area in square inches?

   148
7. 7.

   Milo's lunch box is 6 in long, 2.5 in wide and 4 in tall. Milo makes the height twice as tall. More room for snacks. What is its new surface area in square inches?

   166
8. 8.

   Noah wants to wrap a gift box in paper. The ribbon is extra curly. Which measure tells how much paper covers it?

   • Surface area, in square cm
   • Volume, in cubic cm
   • Length of one edge, in cm
9. 9.

   Pia wants to know how much room is inside a toy chest. It is a bit messy. Which measure is that?

   • Surface area, in square inches
   • Volume, in cubic inches
   • Length of the floor's edge, in inches
10. 10.

    Ren paints the outside of a wooden block. It has a golden star. Which measure tells how much surface the paint covers?

    • Surface area, in square inches
    • Perimeter of one face, in inches
    • Volume, in cubic inches