Lesson Plan
Curated OER

Transportation Math

For Teachers 4th - 5th
Students use mathematical operations to examine truck drivers and the math they use everyday. In this transportation math lesson, students read word problems that relate to transportation and the math needed to solve the word problems....
Interactive
Curated OER

Commonly Confused Words - Quiz 25

For Students 3rd - 6th
In this confused words worksheet, students fill in the blanks to sentences by choosing the correct confusing word. Students complete 20 sentences.
Lesson Plan
Curated OER

The Bell Curve

For Teachers All
Students are introduced to the normal distribution and examine the bell curve controversy.
Worksheet
Curated OER

Worksheet 26

For Students 11th - Higher Ed
In this math worksheet, students use the polar coordinates to find the Euclidian coordinates. Then they compare points on the coordinate plane.
Interactive
Sophia Learning

Sophia: Sum of Angles in Polygons

For Students 6th - 8th
This tutorial with video and slideshow components investigate the characteristics of polygons as well as how to calculate the interior and exterior angles of any polygon. It offers two PowerPoint presentations and two videos that feature...
Unit Plan
Texas Education Agency

Texas Gateway: Geometric Properties of Angle Relationships in Polygons

For Students 9th - 10th Standards
Given numerical and/or geometric patterns that represent geometric properties of angle relationships in polygons, the student will investigate patterns to make conjectures about interior and exterior angles of polygons.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A ced.a.1: Sum of Angles in a Polygon

For Teachers 9th - 10th
This problem provides students with an opportunity to discover algebraic structure in a geometric context. They will divide up polygons into triangles. The will use the sum of the angles of 180 degrees for each triangle. Aligns with...
Activity
Texas Instruments

Texas Instruments: Sum of Remote Interior Angles Equals Exterior Angle

For Teachers 9th - 10th
Draw a triangle with exterior angle. Measure the exterior angle and each remote interior angle. Use the Alpha hand to check that the sum of the remote interior angles is always equal to the exterior angle.
Activity
Texas Instruments

Texas Instruments: Extension: Parallel Lines and the Sum of the Angles

For Teachers 6th - 8th Standards
Students construct a line parallel to the base of a triangle and measure the angles formed. They use the construction to prove that the sum of the measures of the interior angles of a triangle is 180 degrees.
Activity
Texas Instruments

Texas Instruments: Sum of Interior Angles in a Triangle With Cabri Jr.

For Teachers 9th - 10th
Students will discover the sum of the interior angles in a triangle using the Cabri Jr. Application.
Interactive
Walter Fendt

Walter Fendt: Sum of Angles in a Triangle

For Students 9th - 10th
A short interactive activity to show that the sum of the angles of a triangle is 180 degrees.
Activity
Texas Instruments

Texas Instruments: Betweenness and the Sum of Parts

For Teachers 9th - 10th
In this activity, students will explore the concepts of betweenness and the sum of parts visually, geometrically, and numerically for segments and angles using the Cabri Jr. application. They will investigate how the sum of parts equals...
Activity
Government of Alberta

Learn Alberta: Math Interactives: Exploring Angles Within a Triangle

For Students 6th - 8th
This multimedia Learn Alberta math resource looks at angles of a triangle in the context of building bikes and choosing bike sizes. The accompanying interactive component lets students explore build different sized triangles while...
Activity
Math Is Fun

Math Is Fun: Angles on a Straight Line

For Students 3rd - 8th Standards
This very basic website gives a clear, simple explanation of the sum of angles on a straight line that when put together form a straight angle.
Activity
Texas Instruments

Texas Instruments: Investigating the Angle Sum Theorem of Polygons

For Teachers 9th - 10th
This activity will allow students to use Cabri Jr. to find the sum of the measures of interior angles of convex polygons and visually see how the Interior Angle Sum Theorem works.
Activity
Texas Instruments

Texas Instruments: Angles in a Polygon

For Teachers 9th - 10th
Students will expore the interior and exterior angle of 3 polygons and develop the formula to calculate the sum of degrees without the measurement of the angles being taken.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Polygons: Interior and Exterior Angles

For Students 9th - 10th
A great resource where you can learn how to calculate the measures of the interior and exterior angles of any regular polygon with these tutorials. There are several practice pages for someone to try. The teacher resource page includes...
Interactive
Mangahigh

Mangahigh: Shape: Proof of the Sum of the Angles in a Triangle

For Students 9th - 10th Standards
Determine that all angles in a triangle equal 180 degrees.
Unknown Type
Khan Academy

Khan Academy: Using the Trig Angle Addition Identities

For Students 9th - 10th Standards
Find the trig values of sums of angles whose individual trig values are known. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Exterior Angles Theorems

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This concept teaches students the sum of exterior angles for any polygon and the relationship between exterior angles and remote interior angles in a triangle....
Activity
Other

Gobierno De Navarra: Medidas De Angulos

For Students 9th - 10th Standards
Interactive figures to learn about the sum of the measurement of the angles of different plane figures.
Unit Plan
Khan Academy

Khan Academy: Equation Practice With Angle Addition

For Students 7th - 8th Standards
Given the sum of a pair of angles and the algebraic expressions that represent them, form and solve an equation. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Activity
Math Is Fun

Math Is Fun: Interior Angles of Polygons

For Students 3rd - 8th Standards
Learn what an interior angle of a polygon is and how you can calculate their value in triangles, quadrilaterals, and pentagons. Includes a chart that overviews the "general rule" for determining the sum of internal angles in any polygon...
Interactive
Mangahigh

Mangahigh: Shape: The Angles Inside a Quadrilateral

For Students 5th - 8th Standards
Test your knowledge of the sum of angles inside a quadrilateral.

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