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Math Open Reference

Math Open Reference: Parallelogram: (Coordinate Geometry)

For Students 6th - 8th Standards
Students are able to manipulate a parallelogram on a coordinate grid to explore properties of a parallelogram and then calculate the distance of the sides, altitude, and area. The resource also includes links to further explain important...
Lesson Plan
Alabama Learning Exchange

Alex: Thinking Outside the "Box"

For Teachers 6th - 8th
The learners will find the area of each two dimensional figure on a net of a rectangular prism. In groups, students will cut out the net and create a rectangular prism. Groups will then discuss how to find the lateral area and the total...
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Calculator Soup

Calculator Soup: Rectangle Calculator

For Students 9th - 10th
Use this calculator if you know 2 values for the rectangle, including 1 side length, along with area, perimeter, or diagonals and you can calculate the other 3 rectangle variables. A square calculator is a special case of the rectangle...
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Calculator Soup

Calculator Soup: Right Triangles Calculator

For Students 9th - 10th Standards
Use this calculator to find the unknown angles in a right triangle using the Pythagorean Theorem. Once you know the sides you can calculate the perimeter, semiperimeter, area, and the altitudes.
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Calculator Soup

Calculator Soup: Rhombus Calculator

For Students 9th - 10th
Calculate certain variables of a rhombus depending on the inputs provided. Calculations include side lengths, corner angles, diagonals, height, perimeter, and area of a rhombus.
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Calculator Soup

Calculator Soup: Square Calculator

For Students 9th - 10th Standards
Use this square calculator to find the side length, diagonal length, perimeter, or area of a geometric square. Given any 1 variable you can calculate the other 3 unknowns.
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Calculator Soup

Calculator Soup: Regular Polygon Calculator

For Students 9th - 10th Standards
Use this calculator to calculate properties of a regular polygon. Enter any 1 variable plus the number of sides or the polygon name. Calculates side length, inradius, circumradius, area, and perimeter.