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8th grade (Illustrative Mathematics)

Course: 8th grade (Illustrative Mathematics) > Unit 8

Lesson 11: Extra practice: Pythagorean theorem
Math
8th grade (Illustrative Mathematics)
Unit 8: Pythagorean theorem and irrational numbers
Extra practice: Pythagorean theorem
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Pythagorean theorem in 3D

CCSS.Math: 8.G.B.7, HSG.SRT.C.8
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Problem

Each vertical cross-section of the triangular prism shown below is an isosceles triangle.
A triangular prism with a vertical height of h units, a base of six units, and a slant height of three square root two units.
What is the vertical height, h, of the triangular prism?
Round your answer to the nearest tenth.
The height is
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
units.
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