Sorting Polygons: Strategies for Classification

This tutorial explains the importance of sorting polygons and introduces five criteria for sorting: number of sides, side lengths, parallel sides, types of angles, and lines of symmetry. Examples of sorting an isosceles triangle, a rectangle, and a rhombus are provided to illustrate the application of these criteria.

Why is it important to learn how to sort polygons?

• To distinguish between different shapes

• To improve drawing skills

• To enhance digital graphic design

• To solve algebraic equations

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CCSS.2.G.A.1

How many sides does an isosceles triangle have?

• Three

• Two

• Five

• Four

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CCSS.4.G.A.2

Does an isosceles triangle have any parallel sides?

• Not mentioned

• No

• Yes, one pair

• Yes, two pairs

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CCSS.4.G.A.2

How many lines of symmetry does an isosceles triangle have?

• Three

• One

• Two

• None

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CCSS.4.G.A.3

What types of angles are found inside a rectangle?

• Only acute angles

• Only obtuse angles

• Only right angles

• A mix of acute and obtuse angles

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CCSS.HSG.CO.C.11

How many lines of symmetry does a rectangle have?

• Four

• Three

• Two

• One

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CCSS.4.G.A.3

What is a characteristic feature of the sides of a rhombus?

• Only one pair of sides is equal

• No sides are equal

• All sides are of different lengths

• All sides are equal

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CCSS.3.G.A.1

How many pairs of parallel sides does a rhombus have?

• None

• One

• Two

• Three

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CCSS.5.G.B.4

What types of angles does a rhombus typically have?

• Only obtuse angles

• Acute and obtuse angles

• Only acute angles

• Only right angles

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CCSS.5.G.B.4

How many lines of symmetry are there in a rhombus?

• Four

• Two

• One

• None

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CCSS.4.G.A.3