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Geometry and Measurement Conversions Practice Problems

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Updated on Aug 24, 2011

To review these concepts, go to Geometry and Measurement Conversions Study Guide.

Practice

Directions: Use scratch paper to solve the following problems.

  1. Find the perimeter of the following polygon.
  2. Geometry and Measurement Conversions

  3. Find the perimeter of the following polygon.
  4. Geometry and Measurement Conversions

  5. Find the perimeter of a triangle with sides 3 mm, 4 mm, and 5 mm.

Find the circumference of the following.

  1. a circle with radius 5 cm
  2. a circle with diameter 10 m

Solutions

  1. You could have added all the sides: 21 + 21 + 21 + 21 = 84. Or, you could have multiplied 21 × 4, because this polygon is a square.
  2. You could have added all the sides: 35 + 7 + 35 + 7 = 84. Or, you could have used the formula P = 2l + 2w, because this polygon is a rectangle.
  3. Add up the lengths of the three sides: 3 + 4 + 5 = 12. So, your final answer is 12 mm.
  4. You are given the radius, so use C = 2πr. Plug in the radius and pi and multiply: (2)(3.14)(5) = 31.4. So, your final answer is 31.4 cm.
  5. You are given the diameter, so use Cd. Plug in the diameter and pi and multiply: (3.14)(10) = 31.4. So, your final answer is 31.4 cm.
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