Unit Plan
Ck 12: Elem Math: Classify Objects as Rectangles, Squares, Circles, or Triangles Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Classify Objects as Rectangles, Squares, Circles, or Triangles

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on classifying rectangles, squares, circles and triangles.
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Unit Plan
Ck 12: Geometry: Triangle Classification by Angles Unit Plan
CK-12 Foundation

Ck 12: Geometry: Triangle Classification by Angles

For Students 6th
[Free Registration/Login may be required to access all resource tools.] Classify different types of triangles by their angles.
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Unknown Type
Khan Academy: Recognizing Triangle Types Unknown Type
Khan Academy

Khan Academy: Recognizing Triangle Types

For Students 3rd - 5th
In this exercise, students practice recognizing triangle types. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
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Unit Plan
Khan Academy: Constructing Triangles Unit Plan
Khan Academy

Khan Academy: Constructing Triangles

For Students 6th - 8th Standards
Practice constructing triangles. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Unit Plan
Ck 12: Geometry: Polygon Classification Unit Plan
CK-12 Foundation

Ck 12: Geometry: Polygon Classification

For Students 6th
[Free Registration/Login may be required to access all resource tools.] Classify different types of polygons by their number of sides.
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Whiteboard
Class Flow: Triangles Whiteboard
ClassFlow

Class Flow: Triangles

For Teachers 3rd - 8th Standards
[Free Registration/Login Required] Using this flipchart students learn to recognize and classify different triangles, including equilateral, isosceles and scalene. The teacher will use this lesson plan to review different types of...
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Whiteboard
Class Flow: Triangles and Angles Whiteboard
ClassFlow

Class Flow: Triangles and Angles

For Teachers 9th - 10th Standards
[Free Registration/Login Required] Classify angles by their side and angles. Find angles and measure in triangles.
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Handout
Ck 12: Geometry: Polygons Study Guide Handout
CK-12 Foundation

Ck 12: Geometry: Polygons Study Guide

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This study guide focuses on polygons: convex vs concave, interior and exterior angles, and basic terminology for common polygons.
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Whiteboard
Class Flow: Two Dimensional Shapes Identify and Match Whiteboard
ClassFlow

Class Flow: Two Dimensional Shapes Identify and Match

For Teachers Pre-K - 1st Standards
[Free Registration/Login Required] This flipchart helps students to analyze and compare various two-dimensional shapes according to the vertices, sides and parallel lines. It features "containers" created in Version 3 (can be used with...
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Activity
Number Nut: Shapes, Symbols, and Colors: 2 D Shapes Activity
NumberNut

Number Nut: Shapes, Symbols, and Colors: 2 D Shapes

For Students K - 1st Standards
Did you know that two-dimensional shapes are also called polygons? This lesson describes the various 2-D shapes and includes two interactive games to reinforce skills.
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