Texas Gateway: Geometric Properties of Angle Relationships in Polygons

High schoolers find triangular angles using the angle theorem. In this geometry lesson, students describe labeled triangles, use the pythagorean theorem, and rewrite information about triangles in standard form.

In this lesson, you will show angle relationships in cyclic quadrilaterals by using the Central Angle Theorem. [3:27]

Given numerical and/or geometric patterns that represent angle relationships in circles, the student will investigate inscribed angle relationships.

Break down interior and exterior angles with this video. Using a pentagon, a teacher demonstrates how to find the interior and exterior angles of a polygon. She goes on to explain a few of the properties of these angles, writing down all...

This appendix should be consulted after first reading "Welcome to Economics." Though economics is not math, there is no important concept in this course that cannot be explained without mathematics. That said, math is a tool that can be...

This learning module discusses quantitative and qualitative data, the use of two-way tables in marginal and conditional distributions, how to display data, variation in data and samples, and how to critically evaluate statistical...

This lesson models how to solve problems involving samples of populations and the variability in the results of a statistical study. Provides a link to an interactive web app called "Sampling Distribution of the Sample Proportion."...

This lesson continues an exploration of variability in sample proportions that was begun in the Part 1 video, extending the ideas. About four minutes in, it provides a link to an interactive web app called "Sampling Distribution of the...

This lesson investigates the variability in the sampling distribution of the sample mean for a population. Provides a link to an interactive web app for looking at a continuous population distribution. Includes downloadable study guide...

Learn to look at polygons from the right angle. Scholars first use the formula (n - 2) * 180 to determine the sum of the interior angles of a polygon. The video then asks them to consider the sum of the exterior angles.