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This page provides a list of educational videos related to Explore Angle Measure. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Explore Angle Measure.
Area of rectangles and the distributive property | Measurement | Pre-Algebra | Khan Academy
By Khan Academy
Use the distributive property to find area of rectangles
Area of diagonal generated triangles of rectangle are equal | Geometry | Khan Academy
By Khan Academy
In this video, Mr. Khan draws a box and two intersecting lines that produce several triangles. Mr. Khan proves that the area of these diagonal-generated triangles of the rectangle are equal. He goes over the formula for finding the area of a triangle. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The screen gets busy (and dark)--the viewer may want to open to 'full screen' to see everything. The sound is a little low
Area of an equilateral triangle | Perimeter, area, and volume | Geometry | Khan Academy
By Khan Academy
Finding the formula for the area of an equilateral triangle with side s. All Khan Academy content is available for free at www.khanacademy.org
Word Problem Involving Perimeter of a Triangle - ex 2
By PatrickJMT
YouTube presents Word Problem Involving Perimeter of a Triangle - ex 2, an educational video resource on math.
Word Problem Involving the Perimeter of a Rectangle – Ex 1
By PatrickJMT
YouTube presents Word Problem Involving the Perimeter of a Rectangle, an educational video resource on math.
Area of a triangle problem using formula 1/2 x ab x Sin(C) - YouTube
By mattam66
Area of a triangle problem using formula 1/2 x ab x Sin(C) - YouTube
Area of rectangles and rectangular shapes. Concrete case of the distributive property (3.MD.7.c)
By Math Mammoth
the area of a rectangle with whole-number side lengths a and b + c is the sum of a × b and a × c.
Area of rectangles and rectangular shapes. Concrete case of the distributive property (3.MD.7.c)
By Math Mammoth
Area of rectangles can be found by multiplication. In my example rectangle, we count the rows and columns, and then write a multiplication to find the area (5 x 3 = 15 squares).
Triangle inequality theorem | Perimeter, area, and volume | Geometry | Khan Academy
By Khan Academy
Salman Khan offers his intuition behind the triangle inequality theorem during this six-minute video lesson.
Area of inscribed equilateral triangle (some basic trig used) | Circles | Geometry | Khan Academy
By Khan Academy
This video will give you a good feel for what inscribed figures are like. It uses some trigonometry to figure out what the area of an equilateral triangle inscribed in a circle is, given the circle's radius. NOTE: We don't actually need trigonometry to solve this problem. Notice that we can view the equilateral triangle as six identical 30-60-90 triangles, the hypotenuses of which are radii of the circle, then use the 30-60-90 triangle side length ratios to figure out the rest of what we need to know to solve the problem.
Area of inscribed equilateral triangle (some basic trig used) | Circles | Geometry | Khan Academy
By Khan Academy
This video will give you a good feel for what inscribed figures are like. It uses some trigonometry to figure out what the area of an equilateral triangle inscribed in a circle is, given the circle's radius. NOTE: We don't actually need trigonometry to solve this problem. Notice that we can view the equilateral triangle as six identical 30-60-90 triangles, the hypotenuses of which are radii of the circle, then use the 30-60-90 triangle side length ratios to figure out the rest of what we need to know to solve the problem.
Area of an Equilateral Triangle
By Khan Academy
Finding the formula for the area of an equilateral triangle with side s. All Khan Academy content is available for free at www.khanacademy.org
How to Find the Area of a Triangle
By eHow
In this video learn how the area of a triangle can be determined by multiplying half of the base by the height as a triangle is essentially half of a quadrilateral shape. Calculate the area of a triangle with instructions from a college-level math teacher in this free video on geometry. Narrator draws examples on a whiteboard with marker.
Area of a Triangle - MathHelp.com - Geometry Help
By yourteachermathhelp
Students learn the formula for the area of a triangle and are asked to solve problems using this formula. Note that right triangle formulas and trigonometry are used extensively in the problems in this lesson.
Rectangle area as product of dimensions same as counting unit squares | Pre-Algebra
By Khan Academy
Use unit squares to see why multiplying side-lengths can also find the area of rectangles. ������������������������
Rectangle area as product of dimensions same as counting unit squares
By Khan Academy
Use unit squares to see why multiplying side-lengths can also find the area of rectangles. ������������������������
Measuring the same rectangle with different unit squares
By Khan Academy
Find area of a rectangle with different sized units.