Understanding Angles in Two-Dimensional Shapes

This lesson covers the concept of angles in two-dimensional shapes, explaining how angles are formed when two sides meet. It demonstrates how to identify and count angles in various shapes like triangles, quadrilaterals, pentagons, and hexagons. The lesson also includes exercises on drawing shapes with a specified number of angles and emphasizes the relationship between the number of sides, vertices, and angles in 2D shapes. The video concludes with a review of these concepts, preparing students for the next lesson on sorting shapes by angles and sides.

What is formed when two sides of a shape meet?

• A vertex

• A line

• An angle

• A circle

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CCSS.2.G.A.1

How many angles does a triangle have?

• Five

• Four

• Three

• Two

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CCSS.2.G.A.1

If a shape has more sides, what can be said about its angles?

• The number of angles remains the same

• It has more angles

• It has no angles

• It has fewer angles

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CCSS.2.G.A.1

How many sides does a hexagon have?

• Four

• Five

• Seven

• Six

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CCSS.2.G.A.1

What is the relationship between the number of sides and angles in a two-dimensional shape?

• The number of sides is unrelated to the number of angles

• The number of sides is equal to the number of angles

• The number of sides is always half the number of angles

• The number of sides is always double the number of angles

Tags

CCSS.2.G.A.1

How many angles does a quadrilateral have?

• Five

• Two

• Three

• Four

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CCSS.HSG.CO.A.1

What is the term for the point where two sides of a shape meet?

• Line

• Arc

• Edge

• Vertex

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CCSS.2.G.A.1

If a shape has seven sides, how many angles does it have?

• Seven

• Eight

• Six

• Five

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CCSS.2.G.A.1

CCSS.1.G.A.1

What is the next lesson about?

• Understanding symmetry in shapes

• Calculating the area of shapes

• Sorting two-dimensional shapes by angles and sides

• Identifying three-dimensional shapes

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CCSS.2.G.A.1

CCSS.1.G.A.1

Which shape has the same number of sides, vertices, and angles?

• Circle

• Triangle

• Rectangle

• Oval

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CCSS.2.G.A.1

CCSS.1.G.A.1