Lesson 5.65.6 Small Group · Group 1
Group 1 · Set BSecond form · new problems, same idea
Learning target With my small group, I can find the surface area of a solid by using its net — one step at a time, with support.
Remember5.6 Small Group · Group 1
A net shows every face of a box, so the surface area is the sum of all 6 face areas, written in square units. A net unfolds a box into flat faces. Surface area is the sum of the areas of all the faces.
Words: Surface area (Área de superficie)Net (Plantilla (desarrollo plano))Face (Cara)Two-dimensional (Bidimensional)Edge (Arista)
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1Complete each step, then write the final answer.
A box is 5 cm long, 3 cm wide, and 2 cm tall. Find its surface area.
Show your workHint Find each pair: 2 × (5 × 3), 2 × (5 × 2), 2 × (3 × 2). Then add.
Final answer: -
2Complete each step, then write the final answer.
A box is 6 ft long, 5 ft wide, and 3 ft tall. Find its surface area.
Show your workHint Find the area of each pair of faces. Then add.
Final answer: -
3Complete each step, then write the final answer.
A gift box is 10 in long, 10 in wide, and 3 in tall. How much wrapping paper covers it with no overlap?
Show your workHint The paper covers all 6 faces. The top and bottom are squares.
Final answer: -
4Complete each step, then write the final answer.
A box with no lid is 6 in long, 4 in wide, and 5 in tall. How much cardboard makes the box?
Show your workHint A box with no lid has only 5 faces. The bottom has no matching top.
Final answer:
Explain your thinkingWhy does the net of a box have 3 pairs of matching faces? Use Jin's mistake to explain.
Sentence starter Each face has a matching face because ___. · Jin's answer is too small because ___.