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Describe Plane Shapes and Identify Polygons

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Presentation on theme: "Describe Plane Shapes and Identify Polygons"— Presentation transcript:

1 Describe Plane Shapes and Identify Polygons
Lessons 12.1 and 12.3 Describe Plane Shapes and Identify Polygons

2 Lesson Opening In your math notebook describe (using words) the two shapes below.

3 or shapes on a flat surface.
Plane Shapes Both of these shapes are PLANE SHAPES or shapes on a flat surface.

4 Closed Shapes This is a closed shape, or a shape that starts and ends at the same point.

5 These are all closed shapes.

6 Open Shapes This is an open shape, or a shape that does NOT start and end at the same point.

7 These are all open shapes.

8 Polygons Some closed shapes are made up of only line segments. These shapes are called polygons.

9 Polygons Some closed shapes are made up of only line segments. These shapes are called polygons. This polygon has 5 line segments. 1 2 5 3 4

10 Polygons Some closed shapes are made up of only line segments. All of these shapes are polygons.

11 Describe this shape

12 Describe this shape Plane Shape Closed Shape Polygon
Made up of 5 line segments

13 Describe this shape

14 Describe this shape Plane Shape Closed Shape

15 A closed shape that is made up only of line segments.
Polygons A closed shape that is made up only of line segments. A triangle is a polygon with 3 sides (or 3 line segments). A quadrilateral is a polygon with 4 sides (or 4 line segments). A pentagon is a polygon with 5 sides (or 5 line segments). A hexagon is a polygon with 6 sides (or 6 line segments). A octagon is a polygon with 8 sides (or 8 line segments).

16 Describe this shape

17 Describe this shape Plane Shape Closed Shape Polygon
Quadrilateral (4 sides)

18 Describe this shape

19 Describe this shape Plane Shape Closed Shape Circle

20 Describe this shape

21 Describe this shape Plane Shape Closed Shape Polygon Hexagon (6 sides)

22 Describe this shape

23 Describe this shape Plane Shape Closed Shape Polygon
Pentagon (5 sides)

24 Review of what we have learned
Plane Shapes (2-dimensional shapes) Closed Shapes Not Polygons (circles, shapes with curved lines) Polygons Triangles (3 sides) Quadrilaterals (4 sides) Pentagons (5 sides) Hexagons (6 sides) Octagons (8 sides) Other Polygons Open Shapes

25 Exit Ticket Which terms describe the shape below? Plane shape
Closed shape Open shape Polygon Triangle Quadrilateral hexagon Select all the terms that describe BOTH figures below. Closed shapes Open shapes Plane shapes Polygons Triangles quadrilaterals pentagons a, b, d, f a, c, d, f


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