Lumos Video Store
This page provides a list of educational videos related to Finding the Measure of Two Angles. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Finding the Measure of Two Angles.
Unknown angle algebra problems
By Khan Academy
Given two intersecting lines and the measure of vertical angles, watch as we solve to find the measure of the remaining angles.
Inscribed Angles - YourTeacher.com - Geometry Help
By yourteachermathhelp
Students learn the definition of an inscribed angle, and that the measure of an inscribed angle is equal to ½ the measure of its intercepted arc. Students also learn the following theorems related to inscribed angles. If two inscribed angles intercept the same arc, then the angles are congruent. An angle inscribed in a semicircle is a right angle. If a quadrilateral is inscribed in a semicircle, then opposite angles are supplementary. The measure of an angle formed by a chord and its tangent is half the measure of the intercepted arc. Students are then asked to find the missing measures of arcs and angles in given circles using these theorems.
Units of Measurement | MathHelp.com
By MathHelp.com
This lesson covers vertical angles. Students learn the definition of vertical angles and the vertical angle theorem, and are asked to find the measures of vertical angles using Algebra. Students also solve two-column proofs involving vertical angles.
Find measure of vertical angles | Angles and intersecting lines | Geometry | Khan Academy
By KhanAcademy
Now that we've learned about complementary and supplementary angles, let's use algebra to find the measure of vertical angles, or angles opposite each other when two lines cross.
Find missing angles of triangles
By Khan Academy
Sal solves the following problem: The measures of two angles of an isosceles triangle are 3x+5 and x+16. Find all possible values of x.
Law of cosines
By Khan Academy
Sal is given a triangle with two side lengths and the contained angle measure, and he finds the missing side length������������using the law of cosines.
Law of cosines
By Khan Academy
Sal is given a triangle with two side lengths and the contained angle measure, and he finds the missing side length������������using the law of cosines.
Angles (part 3) | Angles and intersecting lines | Geometry | Khan Academy
By Khan Academy
This video uses an electronic black board with different colored pens. Angles formed with two parallel lines (defines parallel lines) and a transversal line (a line that crosses the two parallel lines). The video then goes into labeling the various angles, corresponding angles, opposite angles, alternate interior angles, alternate exterior angles, and supplementary angles. The last thing the video explains is that all the angles in a triangle add up to 180 degrees. It shows how to find the measurements of each of these angles. Good video for review of concepts and angle vocabulary. Good for middle school students.
Law of sines
By Khan Academy
Sal is given a triangle with two side lengths and one angle measure, and he finds all the missing angle measures������������using the law of sines.
Law of sines
By Khan Academy
Sal is given a triangle with two angle measures and one side length, and he finds all the missing side lengths and angle measures������������using the law of sines.