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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Sss Similarity

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to decide whether or not two triangles are similar using SSS Similarity.
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Lesson Plan
Alabama Learning Exchange

Alex: Geometric Mean and Indirect Measurement

For Teachers 9th - 10th
In this inquiry-based lesson, students will work in groups to gather measurements needed to approximate the height of a building. Students will discover how geometric mean can be used to find the lengths of missing sides of right...
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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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Interactive
CK-12 Foundation

Ck 12: Angle Bisectors in Triangles

For Students 9th - 10th Standards
[Free Registration/Login Required] Students will use interactive triangles to explore how a line bisects an angle. Click learn more to watch a video and click challenge me to answer a practice question.
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Activity
University of Cambridge

University of Cambridge: Nrich: Triangles to Tetrahedra

For Students 3rd - 8th Standards
Given an unlimited number of a specific type of equilateral, isosceles, and right triangles create as many tetrahedra as are possible. Includes printout.
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Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Law of Sines

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Learn how to use the Law of Sines with different types of triangles.
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Whiteboard
ClassFlow

Class Flow: Angle This Way

For Teachers 3rd - 5th Standards
[Free Registration/Login Required] Students will identify right, acute and obtuse triangles using many interactive tools available in ACTIVstudio 3.0. Students will be engaged using a magnifier tool, the fill tool, and drag and drop and...
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Interactive
Mangahigh

Mangahigh: Pyramid Panic: Basic Shapes to Advanced Geometry

For Students 9th - 10th Standards
Guide a mummy safely through the burial chambers of a pyramid as you solve length and area problems in basic to advanced geometry. There are four game zones that deal with circles and triangles, quadrilaterals, the Pythagorean Theorem,...
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Handout
The Math League

The Math League: Figures and Polygons

For Students 9th - 10th Standards
This site provides definitions of different types of polygons and figures.
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Interactive
CK-12 Foundation

Ck 12: Perpendicular Bisectors

For Students 9th - 10th Standards
[Free Registration/Login Required] Students will move point N to the other points to determine when the line bisects the triangle perpendicularly. Click learn more to watch a video and click challenge me to answer practice questions.
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Unknown Type
OER Commons

Oer Commons: Pre Assessment

For Teachers 6th - 8th Standards
Students solve for missing angle measures by applying what they have learned about types of angles and the angle measures of polygons. Students do a pre-assessment at the end of the lesson.
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Whiteboard
ClassFlow

Class Flow: Angles, Triangles and Quadrangles

For Teachers 3rd - 5th
[Free Registration/Login Required] This flipchart is designed to accompany fourth grade's Everyday Math (version 3) lesson 1.3, this flipchart explores different types of angles, triangles and quadrangles through engaging presentation...
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Unit Plan
E-learning for Kids

E Learning for Kids: Math: Riksjas, Toek Toek: Polygons

For Students 5th - 6th
Explore polygons with Wang, a ricksha puller. Answer his questions and he will give you a free ride!
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Activity
University of Cambridge

University of Cambridge: Maths and Sports: Stadium Sightline

For Students 9th - 10th
How would you design the seating for an Olympic stadium to give spectators the best view of events? This geometry and modelling activity is designed to be accessible to both GCSE and A-level maths students (Key Stage 4 and Key Stage 5),...
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Lesson Plan
Alabama Learning Exchange

Alex: Card Table Project

For Teachers 9th - 10th
Students will work in groups to design a card table. Students will communicate with each other through a class blog or class discussion page. Students will then work in groups to design a card table. After the design phase, students will...
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Handout
Math Open Reference

Math Open Reference: Polygons

For Students 9th - 10th
Get the definition and properties of a polygon. Then explore such topics as: 1) types of polygon 2) area 3) Perimeter 4) angles associated with polygons and 5) names of polygons.
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Unit Plan
E-learning for Kids

E Learning for Kids: Math: Music: 2 D Shapes

For Students 4th - 6th
Kyan is an African villager. Can you help him name and define different parts of shapes?
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Activity
Beacon Learning Center

Beacon Learning Center: Anglemania!

For Students 3rd - 5th Standards
Students explore four types of angles in this interactive web lesson.
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Activity
Texas Instruments

Texas Instruments: Numb3 Rs: To Pythagoras and Beyond

For Teachers 9th - 10th Standards
Based off of the hit television show NUMB3RS, this lesson has students discover the Pythagorean relationships of different triangle types. By the end of the lesson, students should be able to take three given side lengths and compute...
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Lesson Plan
Better Lesson

Better Lesson: Tri, Tri, Tri Angle!

For Teachers K Standards
Kindergarteners love to identify shapes in their environment. In order effectively do that, they must be able to recognize different shapes by their specific attributes. In this lesson kindergartners learn about different types of...
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eBook
Mathigon

Mathigon: Geometry: Polygons and Polyhedra: Polygons

For Students 9th - 10th Standards
This lesson focuses on polygons; a polygon is a closed, flat shape that has only straight sides. Polygons can have any number of sides and angles, but the sides cannot be curved.
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eBook
Mathigon

Mathigon: Algebra: Sequences and Patterns

For Students 9th - 10th Standards
Explore this course in sequences and patterns including simple sequence, triangle and square numbers, terms, recursive formulas, and explicit formulas. Click on Trailer on the top left to watch an introductory video.
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Unit Plan
Khan Academy

Khan Academy: Properties of Shapes

For Students 4th - 6th
Identify and compare shapes based on their attributes. Shapes include triangle types, quadrilateral types, pentagons, and hexagons. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...
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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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