Free Printable WorksheetMathGrade 8Math Curriculum7.G.B.6

8.143 Surface Area of Rectangular Prisms Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Grade 8 Math worksheet provides structured practice on 8.143 Surface Area of Rectangular Prisms. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

8.143 Surface Area of Rectangular Prisms - Which surface area is correct for the rectangular prism described? (CCSS 7.G.B.6; CA 7.G.B.6; MA 7.G.B.6)

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Grade 8

Subject

Math

Domain

Math Curriculum

Formats

PDF & DOCX

Sample Practice Problems

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Below are sample questions representative of the exercises included on this worksheet and related 8.143 Surface Area of Rectangular Prisms skill assessments:

Problem 1Difficulty: Hard
A student uses 2(9*3) + 2(9*2) and gets 90 square centimeters for a 9 cm by 3 cm by 2 cm rectangular prism. Is the result correct?
ATrue
BFalse
Solution & Explanation:The student left out the pair of 3-by-2 faces. The missing area is 2(3*2) = 12, so the full surface area is 90 + 12 = 102 square centimeters.
Problem 2Difficulty: Hard
A student adds 28 + 14 + 8 = 50 when finding the surface area of a 7 cm by 4 cm by 2 cm prism. Which step is still needed?
AMultiply 50 by 7 to include the length again.
BDouble 50 to count the matching opposite faces.
CSubtract 8 because the smallest face is overcounted.
DChange 50 to cubic centimeters.
Solution & Explanation:The values 28, 14, and 8 are the three different face areas. Because opposite faces are congruent, the student must double the sum: 2 * 50 = 100 square centimeters.
Problem 3Difficulty: Hard
A prism has three different face areas of 12.5 square units, 15 square units, and 7.5 square units. A student says the surface area is 35 square units. Which corrected answer is right?
A35 square units
B52.5 square units
C70 square units
D105 square units
Solution & Explanation:The student added the three different face areas only once. Double the sum: 2(12.5 + 15 + 7.5) = 70 square units.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Grade 8 Math students. It aligns with educational standard 7.G.B.6 (Primary standard selected for prompt fields: CCSS 7.G.B.6. Skill statement: Which surface area is correct for the rectangular prism described? Associated standards listed with this skill: CCSS 7.G.B.6; CA 7.G.B.6; MA 7.G.B.6. Use this embedded wording as the best available supporting standard description for this workflow.).

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