At the end of this video tutorial, you will understand what kinds of questions to expect when taking the coordinate geometry subsection of the ACT test.

This video lesson defines and provides an example of common geometry terms including theorem, postulate, axiom, and corollary.

Learn about geometry terms like point, line, and ray. We will also learn how to label them.

Discussion of triangles through the use of examples and a video lesson. [1:08]

Understand the linear geometry of a triple bond. [1:11]

51-55, Pythagorean Theorem, compass constructions.

36-40, Pythagorean Theorem and area.

26-30, area, circumference, pythagorean theorem.

Worked examples of triangles and parallelograms.

worked examples of similar triangles.

Worked examples of area, chords, and tangents of circles.

Worked examples of basic trigonometry.

Examples of proof by contradiction.

Worked trigonometry examples.

Worked examples of similar and congruent triangles.

Examples of polygon exterior angles.

Worked examples of deductive reasoning and congruent angles.

Worked examples of compass construction and coordinates.

Worked examples deducing the measure of angles.

This detailed lesson uses slope, midpoint, and distance formulas to prove a quadrilateral is a rectangle in the coordinate plane.

A narrated lesson introducing the five basic shapes of simple molecules. [2:47]

Identifies and labels basic parts of a circle: center, diameter, radius, and circumference. This video also appears in the Geometry: Circles strand. [2:01]

Shows how to find the measure of missing angles using the triangle sum theorem and vertical angles. This video also appears in the Geometry: Triangles strand. [4:55]

Explains how to use the triangle sum theorem to solve for missing angle measures in a triangle. Also addresses the relationship between the measure of an exterior angle of a triangle and the measures of the remote interior angles. This...