Understanding Two-Dimensional Shapes

This video tutorial explores the names and characteristics of two-dimensional shapes, focusing on polygons with straight sides such as triangles, quadrilaterals, pentagons, hexagons, heptagons, octagons, nonagons, and decagons. It also covers non-polygonal shapes like circles and semicircles, providing essential knowledge for exams.

What is a polygon?

• A shape with curved sides

• A shape with straight sides

• A three-dimensional shape

• A shape with no sides

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CCSS.2.G.A.1

Which shape has three straight sides?

• Quadrilateral

• Pentagon

• Hexagon

• Triangle

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CCSS.2.G.A.1

What is a quadrilateral?

• A shape with four straight sides

• A shape with five straight sides

• A shape with three straight sides

• A shape with six straight sides

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CCSS.2.G.A.1

Which shape is similar to the building in America with five sides?

• Hexagon

• Octagon

• Pentagon

• Heptagon

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CCSS.2.G.A.1

What is the name of a shape with six straight sides?

• Heptagon

• Hexagon

• Octagon

• Nonagon

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CCSS.2.G.A.1

Which shape is associated with the number eight?

• Heptagon

• Nonagon

• Octagon

• Hexagon

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CCSS.2.G.A.1

What is a nonagon?

• A shape with nine sides

• A shape with eight sides

• A shape with ten sides

• A shape with eleven sides

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CCSS.2.G.A.1

Which shape has ten straight sides?

• Hexagon

• Heptagon

• Nonagon

• Decagon

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CCSS.1.G.A.1

CCSS.2.G.A.1

What is a circle?

• A shape with four sides

• A shape with no sides

• A shape with straight sides

• A shape with three sides

Which shape is half of a circle?

• Quadrilateral

• Semicircle

• Hexagon

• Pentagon