Plane Figures Unit (2).notebook
December 07, 2015
Plane Figures (2D Shapes)
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Plane Figures Unit (2).notebook
December 07, 2015
Lesson 1: Polygons
https://www.brainpop.com/math/geometryandmeasurement/polygons/preview.weml
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Plane Figures Unit (2).notebook
December 07, 2015
Polygons
A polygon is a CLOSED plane figure made up of 3 or more line segments. These line segments meet at points called vertices (vertex).
To classify (place into categories) polygons, you can count the number of sides and angles they have. 3
Plane Figures Unit (2).notebook
December 07, 2015
Regular Polygons
To be a regular polygon, all sides and angles must be congruent (same size and shape). The figures below are regular polygons.
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Plane Figures Unit (2).notebook
December 07, 2015
Polygons
To name a polygon, you must count the number of sides and angles. Refer to the chart below for types of polygons. The most common ones are highlighted.
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Plane Figures Unit (2).notebook
December 07, 2015
Congruent
Sometimes it can be hard to tell if sides are congruent on a figure. Small marks will tell you which sides are congruent. Both sides with one mark are congruent. Both sides with 2 marks are congruent.
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Plane Figures Unit (2).notebook
December 07, 2015
Review
http://www.math­play.com/basic­shapes­game.html
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Plane Figures Unit (2).notebook
December 07, 2015
Lesson 2: Triangles
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Plane Figures Unit (2).notebook
December 07, 2015
Triangles
Triangles are polygons with three sides. There are different types of triangles. You can classify triangles by the length of their sides and the measure of their angles.
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Plane Figures Unit (2).notebook
December 07, 2015
Triangle Classification Practice
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Plane Figures Unit (2).notebook
December 07, 2015
Lesson 3: Quadrilaterals
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Plane Figures Unit (2).notebook
December 07, 2015
Quadrilaterals
A quadrilateral is a polygon with 4 sides and 4 angles. There are several different types of quadrilaterals. 12
Plane Figures Unit (2).notebook
December 07, 2015
Quadrilaterals We use a hierarchy to help us classify quadrilaterals. A hierarchy is a tree­like diagram used for classifying things.
Keep in mind that all of the shapes in this lesson are considered quadrilaterals. All of them have four sides and angles.
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Plane Figures Unit (2).notebook
December 07, 2015
Quadrilaterals 4 sides
no parallel sides
one pair parallel sides
opposite sides parallel
opposite sides congruent
4 right angles
2 pairs perpendicular sides
4 congruent sides
4 congruent sides
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Plane Figures Unit (2).notebook
December 07, 2015
Quadrilaterals 15
Plane Figures Unit (2).notebook
December 07, 2015
Quadrilaterals Review/Practice
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