Identifying and Classifying Angles Videos - Free Educational Videos for Students in K - 12

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Topic 15.3: Classifying Quadrilaterals


By Dylan Peters EDU

Students will be able to identify and classify quadrilaterals based on the sides, angles, and other properties.

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).

Categorizing geometric shapes: practice examples | 4th grade | Khan Academy


By Khan Academy

Watch and do these example exercises along with us. Remember what you have learned about perpendicular lines, right, obtuse, and acute triangles.