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March 26, 2017

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the measure of angle 1 is twice the measure of angle 2. the measure of angle 3 is 40 degrees less than the measure of angle 2. which of the following tools would you use to determine the measures of the three angles? justify your selection(s). then use the tool(s) to solve the problem.

draw a model
paper/pencil
calculator

  • Triangles - ,

    I would use algebra
    the actual calculations can then be done mentally.

    let angle 2 = x
    let angle 1 = 2x
    let angle 3 = 2x-40

    2x-40 + 2x + x = 180
    etc.

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