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Geometry: Shapes and Formulas




 
The following videos will describe the common geometrical shapes and the formulas to calculate their area and perimeter. The videos also include the use of the Pythagorean Theorem and Heron's formula.

The following diagram shows the Geometry Formulas for perimeter, circumference, area, surface area, and volume. Scroll down the page for more examples and solutions using the geometry formulas.
Geometry Formulas

Perimeter and area of triangles, rectangles, and trapezoids Area of triangles including Heron's Formula. Pythagorean Theorem. Area and circumference of circle Surface Area of Circular Solids (cylinders, cones, spheres)



Area and Circumference of circle. Solve word problems involving perimeter, area and right triangles
A lesson on the basic formulas of geometry, including area and perimeter of rectangles, squares, circles and triangles

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


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