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This page provides a list of educational videos related to add angles. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to add angles.
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.
Proving the Sum of Measures of Angles in a Triangle are 180
By Khan Academy
This video gives us a walkthrough of the proof that the angle measures of the angles of a triangle add up to 180. This proof requires us to draw in a line on our own (specifically, one that is parallel to one side of the triangle, but it could be any side). Then we can treat the two non-parallel sides as transversals.
Parallel Lines | MathHelp.com
By MathHelp.com
This lesson covers imaginary numbers. Students learn that the imaginary number "i" is equal to the square root of -1, which means that i^2 is equal to (the square root of -1) squared, which equals -1. Students also learn to simplify imaginary numbers. For example, to simplify the square root of -81, think of it as the square root of -1 times the square root of 81, which simplifies to i times 9, or 9i. To simplify 11/8i, the first step is to get rid of the "i" in the denominator by multiplying both the numerator and the denominator of the fraction by i, to get 11i/8i^2, and remember that i^2 = -1, so we have 11i/8(-1), or 11i/-8, or -11i/8.
Ancient Geometry - A Revelation
By ScienceOnline
How do we know that the angle measures of a triangle add to 180 degrees? The standard proof is based off of Euclid's postulate, which has never been proven and loses validity when mapped on non-Euclidian curved space.
Learn Equilateral, Scalene & Isosceles Triangles and Acute, Obtuse & Right Triangles - [15]
By Math and Science
Learn Equilateral, Scalene & Isosceles Triangles and Acute, Obtuse & Right Triangles - [15]
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
14 - Reference Angles Explained - Sine, Cosine & Unit Circle - Part 1
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
Adding and Subtracting Angles: 4.MD.7
By TenmarksAmazon
Recognize angle measure as additive. When an angle is decomposed into non-overlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real world and mathematical problems
11 - Learn ArcSin, ArcCos & ArcTan (Inverse Sin, Cos & Tan) - Part 1
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
06 - Review of Essential Trigonometry (Sin, Cos, Tangent - Trig Identities & Functions)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
ALL OF GRADE 9 MATH IN 60 MINUTES!!! (exam review part 3)
By Lumos Learning
Here is a great exam review video reviewing all of the main concepts you would have learned in the MPM1D grade 9 academic math course. The video is divided in to 3 parts. This is part 3: Geometry. In this video you will review parallel line theorems, pythagorean theorem, and volume/surface area of three dimensional shapes.
04 - What is the Unit Circle? Angle Measure in Degrees, Reference Angles & More.
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!