Illustrative Mathematics | v.360 Curriculum

Problem 1

A cube is cut into two pieces by a single slice that passes through points \(A\), \(B\), and \(C\). What shape is the cross-section?

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Describe how to slice the three-dimensional figure to result in each cross-section.

Three-dimensional figure:

Cross-sections:

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Here are two three-dimensional figures.

Describe a way to slice one of the figures so that the cross-section is a rectangle.

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Each row contains the degree measures of two supplementary angles. Complete the table.

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Two months ago, the price, in dollars, of a cell phone was \(c\).

Last month, the price of the phone increased by 10%. Write an expression for the price of the phone last month.
This month, the price of the phone decreased by 10%. Write an expression for the price of the phone this month.
Is the price of the phone this month the same as it was two months ago? Explain your reasoning.

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