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Plane Figures Unit (2).notebook
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December 07, 2015
Plane Figures (2D Shapes)
Plane Figures Unit (2).notebook
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December 07, 2015
Lesson 1: Polygons
https://www.brainpop.com/math/geometryandmeasurement/polygons/preview.weml
Plane Figures Unit (2).notebook
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December 07, 2015
PolygonsA 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.
Plane Figures Unit (2).notebook
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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.
Plane Figures Unit (2).notebook
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December 07, 2015
PolygonsTo 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.
Plane Figures Unit (2).notebook
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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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December 07, 2015
Review
http://www.mathplay.com/basicshapesgame.html
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December 07, 2015
Lesson 2: Triangles
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December 07, 2015
TrianglesTriangles 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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December 07, 2015
Triangle Classification Practice
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Lesson 3: Quadrilaterals
Plane Figures Unit (2).notebook
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December 07, 2015
QuadrilateralsA quadrilateral is a polygon with 4 sides and 4 angles. There are several different types of quadrilaterals.
Plane Figures Unit (2).notebook
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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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December 07, 2015
Quadrilaterals
4 sides
no parallel sides opposite sides parallel
opposite sides congruent
4 right angles2 pairs perpendicular sides
4 congruent sides
4 congruent sides
one pair parallel sides
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December 07, 2015
Quadrilaterals
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December 07, 2015
Quadrilaterals Review/Practice
