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Geometry problems on the coordinate plane
By Khan Academy
Watch Sal classify a quadrilateral as a square, rhombus, rectangle, parallelogram, or trapezoid given its four vertices.
Understand Quadrilaterals - Trapezoid, Rhombus, Parallelogram, Rectangle, Square, Kite - [13]
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
Understanding Rectangles: 2.G.2
By Tenmarks Amazon
a rectangle is partitioned into rows and columns. The total number of partitioned pieces are identified.
Rectangles and squares - 2nd grade math lesson
By mathmamoth
how we can measure the "size" of rectangles and squares: we check how many "little squares" fit inside them.
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 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.
What is a Rectangle?
By Linda Yollis
Third grade tutorial about the rectangle. A square is a rectangle but a rectangle is not a square.
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).
Area of rectangles and the distributive property | Measurement | Pre-Algebra | Khan Academy
By Khan Academy
Use the distributive property to find area of rectangles