Intro to area and perimeter | Basic geometry and measurement - Khan Academy
https://www.khanacademy.org/math/basic-geo/basic-geo-area-and-perimeter
webUnit 1 Intro to area and perimeter. Unit 2 Intro to mass and volume. Unit 3 Measuring angles. Unit 4 Plane figures. Unit 5 Units of measurement. Unit 6 Volume. Unit 7 Coordinate plane. Unit 8 Decomposing to find area. Unit 9 3D figures. Unit 10 Circles, cylinders, cones, and spheres. Unit 11 Angle relationships. Unit 12 Scale.
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