This is part of a collection of terms and definitions related to trigonometry concepts.

This is part of a collection of terms and definitions related to trigonometry concepts.

This is part of a collection of terms and definitions related to trigonometry concepts.

This is part of a collection of terms and definitions related to trigonometry concepts.

This is part of a collection of definitions related to variables, unknowns, and constants.

This is the Teacher's Guide that accompanies Geometry Applications: Angles and Planes.

Archer Fish are amazing hunters, spraying water on insect prey to knock them into the water.

During Medieval times, castles were fortresses, mini-cities where the royalty lived, and symbols of power. Most castles were tall, imposing structures.

This hands-on activity is a companion to the video segment from the Geometry Applications: Angles and Planes video. In particular, it supports the segment on the architecture of Himeji Castle.

In this Algebra Application, students study the life cycles of 13- and 17-year cicadas, as well as the populations of bird predators.

This set of tutorials provides 26 examples of how to find the length of a side of a triangle using given angle or side measurements.

This set of tutorials provides 48 examples of angles and how to identify angles by their measurement. NOTE: The download is a PPT file.

In this Slide Show, we show how to construct an isosceles triangle. This presentation requires the use of the TI-Nspire iPad App. Note: the download is a PPT.

In this Slide Show, we show how to construct the perpendicular bisectors of the three sides of a triangle to show they intersect at a single point. This presentation requires the use of the TI-Nspire iPad App. Note: the download is a PPT.

In this Slide Show, do a hands-on geometry activity to measure π. Note: The download is a PPT file.

In this TI-Nspire Activity, use the Geometry and Graphing Tools to explore the ratio of Circumference to Radius as a linear function. 

In this Slide Show, learn how to use the TI-Nspire App to construct an isosceles triangle. Note: The download is a PPT file.

In this Slide Show, learn about the geometry of castle construction.

In this tutorial, learn what the Angle Addition Postulate is and how to use it to solve problems.

This interactive crossword puzzle tests knowledge of key terms on the topic of triangles.

Use this math game to review triangles. This is a Memory-style game in which students must remember the location of pairs of identical images.

In this Math Riddles Game, have your students review vocabulary around the topic of angles.

In this Math Riddles Game, have your students review vocabulary around the topic of triangles.

Solve an interactive word search puzzle on the topic of Triangles.

Solve an interactive word search puzzle on the topic of Triangles.

Solve an interactive word search puzzle on the topic of Triangles.

Solve an interactive word search puzzle on the topic of Triangles.

Solve an interactive word search puzzle on the topic of Triangles.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is from a collection of triangular shapes. They come labeled and unlabeled.

This is part of a collection of math examples that show how to area and perimeter for different geometric shapes.

This is part of a collection of math examples that show how to area and perimeter for different geometric shapes.

This is part of a collection of math examples that show how to area and perimeter for different geometric shapes.