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.

   Ren's paper tent is a prism 8 in long. Its end is a triangle: base 9, height 6, two slanted sides of 7.5 in. Tape holds it. What is its surface area in square inches?

   246
4. 4.

   Ari's storage box is a prism 5 in long. Its end is a trapezoid: parallel sides 11.5 and 8.5, height 4, slanted side 5 in. Socks inside. What is its surface area in square inches?

   225
5. 5.

   Kira's storage box is 4 in long, 3 in wide and 2 in tall. Kira makes the height twice as tall. It is extra roomy now. What is its new surface area in square inches?

   80
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.

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

   • Length of one edge, in cm
   • Surface area, in square cm
   • Volume, in cubic cm
8. 8.

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

   • Length of the floor's edge, in inches
   • Volume, in cubic inches
   • Surface area, in square inches
9. 9.

   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
10. 10.

    Tala wants to know how much a lunch box can hold. Snacks are on the way. Which measure is that?

    • Surface area, in square cm
    • Length of the longest edge, in cm
    • Volume, in cubic cm