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Home > PC > Chapter 4 > Lesson 4.2.1 > Problem 4-76

4-76.

A circle of radius cm cut out of cardboard weighs g.

  1. How much would a sector weigh?

    What part of the entire cardboard would represent?

  2. How much would a circle of radius cm cut out of the same cardboard weigh?

    What is the area of a circle?

    Set up information involving area and weight.

    Set up a proportion and solve for the new weight.

    Acircle
    Aoriginal
    Weightoriginal
    Anew
    Weightnew ???