New ReviewWhen you are first learning how to evaluate trig functions using the unit circle there are some very important steps you need to know and understand. In this video we will dive right in

In this short video we will answer a standardized math test question using similar triangles to find a unknown angle. We will begin by reviewing the definition of similar figures. We will identify the corresponding angles and use the...

A video entitled "Similar by AA Criterion" which clarifies that if two pairs of corresponding angles are congruent, then the triangles are similar.

A video entitled "Create Triangles" which shows how to draw a triangle with a compass and straight edge.

A video entitled "Angle Problems" which shows how to find missing measures in the case of intersecting lines.

Chagall combined abstract and figurative painting to create a dreamlike memory of the village where he grew up.

Howcast - Learn how to parallel park in this Howcast video with A-Club Driving School.

Howcast - Learn how to do basic modeling poses from model scout Trudi Tapscott in this Howcast video.

Howcast - Learn how to use target arrows and dots in bowling from former PBA touring player Mike D'Ambrosio in this Howcast bowling video.

Howcast - Do your shoulders feel tense after sitting at the computer for long periods? Take a cue from dogs and cats, who stretch their shoulders all the time—have you ever heard one complain about a long day at the office?

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Experience Virgin Galactic Unity's Galactic 02 flight with these amazing views from inside and out of suborbital space plane VSS Unity.



Passengers: Jon Goodwin, Keisha Schahaff and Anastat
ia Mayers.
Crew: Commander...

Pupil outcome: I can find the interior angle of any polygon. Key learning points: - Any polygon can be split into triangles. - Using these triangles you can demonstrate the rule for the interior angle sum of a polygon. - A missing...

In this video, we solve problems using the relationship between inscribed angles, central angles, and arcs (in circles).

How do you prove circle theorems? In this video, we perform some "lazy" proofs that justify some of the relationships like the relationship between an inscribed angle and a central angle, the angle formed by intersecting secants, the...

This is the first of several videos about the Unit Circle. In this video, we will define the unit circle and fill in the radians and degrees. This video explains how to DERIVE the unit circle, but not necessarily how to use it.

The sum of the exterior angles of a polygon is discussed in this video. We derive the rule, solve practice problems, and then at the end we look at an interesting relationship between the sum of the INTERIOR angles and the sum of the...

In this video, we derive the rule for the sum of the interior angles of a polygon: 180(n-2). The formula is derived by taking the number of sides, subtract two (to find the number of triangles), and then multiply by 180. At the end of...

How to prove the Law of Sines. Why does the Law of Sines work? In this video we prove the Law of Sines for right triangles. The Law of Sines is a great tool for finding side lengths and angle measures of triangles, so it is good to know...

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

Welcome to our complete high school mathematics tutorial series! Whether you’re a student preparing for exams, a teacher seeking additional resources, or a parent helping your child succeed in math, these videos cover a wide range of...

Learn how to solve this angles question step-by-step.

Learn how to use the correct angle rules to solve this question.

Triangles can also be classified based on their angles. An acute triangle has all three angles less than 90 degrees, a right triangle has one angle exactly 90 degrees, and an obtuse triangle has one angle greater than 90 degrees. No...