Polygons & Triangles

Which shape is a polygon?

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Which shape is not a polygon?

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Choose the figures that are not polygons.

• 1

• 2

• 3

• 4

• 5

Triangles can be classified by their

• angles

• sides

• both sides and angles

Classify each triangle by its angles and sides.

• equilateral

• right isosceles

• acute scalene

• right scalene

Classify each triangle by its angles and sides.

• obtuse isosceles

• right isosceles

• equilateral

• acute isosceles

Classify each triangle by its angles and sides.

• acute obtuse

• right scalene

• obtuse isosceles

• right isosceles

Classify each triangle by its angles and sides.

• acute isosceles

• right scalene

• obtuse equilateral

• right isosceles

Classify each triangle by its angles and sides.

Equal sides and equal angles, if any, are indicated in each diagram.

• acute scalene

• right scalene

• acute isosceles

• obtuse isosceles

Classify each triangle by its angles and sides.

Equal sides and equal angles, if any, are indicated in each diagram.

• obtuse equilateral

• right isosceles

• acute isosceles

• equilateral