Math Chimp - Math activities aligned to the Common Core standards

7th Grade Videos - Solve real-life and mathematical problems involving angle measure, area, surface area, and volume.


Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.


Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem to write and solve simple equations for an unknown angle in a figure.


Solve real-world and mathematical problems involving area, volume and surface area of two- and three-dimensional objects composed of triangles, quadrilaterals, polygons, cubes, and right prisms.


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Welcome to Math Chimp! We collect free online math games, videos, and worksheets and organize them by the common core standards. We're glad you've come to find great online math activities here... they're free and always will be!
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