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Big Ideas Math Integrated I, 2016

BI

Big Ideas Math Integrated I, 2016 View details

3. Rotations

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Exercise 20 Page 567

Rotational symmetry means that you can spin the figure 180^(∘) or less so that it maps onto itself.

Yes, 180^(∘).

Practice makes perfect

A rectangle has two sets of congruent parallel sides. Since one pair of sides are longer than the other pair, we have to rotate it by 180^(∘) for it to map onto itself. In other words we have to turn it upside down.

Subchapter links

Communicate Your Answer p.561

Monitoring Progress p.563-565

Exercises p.566-568