Unit Plan
Mathematics Vision Project

Module 5: Modeling with Geometry

For Students 9th - 12th Standards
Solids come in many shapes and sizes. Using geometry, scholars create two-dimensional cross-sections of various three-dimensional objects. They develop the lesson further by finding the volume of solids. The module then shifts...
Unit Plan
PBS

Accessible Shapes

For Teachers 6th - 8th Standards
All the 2-D and 3-D measurement work you need is in one location. Divided into three sections, the geometry lesson plans consist of visualization of three dimensions, classifying geometric figures, and finding surface area and volume....
Unit Plan
Virginia Department of Education

Classifying Angles

For Teachers 4th - 8th Standards
Don't be obtuse, this geometry unit is the just the right resource for educating the acute young minds in your class. From classifying and measuring angles, to determining the congruence of shapes, this...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Isosceles Triangles

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Apply the properties of isosceles triangles.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Isosceles Triangles

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept will teach students the properties of isosceles triangles and how to apply them to different types of problems.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Determining the Unknown Angle in an Isosceles Triangle

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 finding the missing angle in an isosceles triangle.
Unit Plan
National Council of Teachers of Mathematics

The Math Forum: Triangle Formulas

For Students 9th - 10th
Investigate the geometric definitions of triangles, focusing upon equilateral, isosceles, right, and scalene with detailed drawings and appropriate formulas for each. This site has links to more information on triangles.
Unit Plan
Wolfram Research

Wolfram Mathworld: Isosceles Triangle

For Students 9th - 10th
MathWorld explains what an isosceles triangle is and how it compares with equilateral, and scalene triangles. The altitude and area of these triangles are also discussed.
Unit Plan
Free Math Help

Free Math Help: Isosceles Triangles

For Students 9th - 10th Standards
Students learn about isosceles triangles. The tutorial consists of definitions and sample exercises with solutions.
Unit Plan
Cuemath

Cuemath: Altitude of a Triangle

For Students 9th - 10th Standards
Explore the world of the altitude of a triangle in this mini-lesson including its definition, altitudes in different types of triangles, formulae, some solved examples, and a few interactive questions for you to test your understanding.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Determine Unknown Angles: Isosceles, Scalene, Right 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 finding the missing angles in triangles.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Classifying All Types of Triangles by Lengths of Sides

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview and attempt practice problems on classifying triangles based on length of sides.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Classifying Triangles by Identifying the Number of Equal Sides

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview and attempt practice problems on classifying triangles based on the number of equal sides.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Classify Triangles, Composite Figures Number of Equal Sides

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video overview and attempt practice problems on classifying a triangle inside a composite figure.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: 45 45 90 Right Triangles

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Apply the special properties of 45-45-90 right triangles.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Triangle Classification Grades 8 10

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Classify triangles by side lengths and angle measures.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Triangle Classification Grade 7

For Students 7th Standards
[Free Registration/Login may be required to access all resource tools.] Classify triangles by side lengths and angle measures.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Triangle Classification Grade 8

For Students 8th
[Free Registration/Login may be required to access all resource tools.] Classifying triangles by using angle measures and side lengths.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Triangle Classification Grades 9 10

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to classify triangles based on their angles and sides.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Triangle Classification by Side Lengths

For Students 6th
[Free Registration/Login may be required to access all resource tools.] Classify different types of triangles by their side lengths.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Recognize 45 45 90 Right Triangles

For Students 8th
[Free Registration/Login may be required to access all resource tools.] Recognize special right triangles and their properties.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Triangle Sum Theorem Grade 8

For Students 8th
[Free Registration/Login may be required to access all resource tools.] Finding and understanding the angle measures of triangles.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Determining the Length of an Unknown Side of a Triangle

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video tutorial and attempt practice problems on how to determine the unknown side length of a triangle.
Unit Plan
Cuemath

Cuemath: Right Angled Triangle

For Students 9th - 10th Standards
Explore and learn about the features and properties of a right triangle in this lesson. Includes examples and practice questions.

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