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Plane Shapes - Trapezoids, Regular Polygons, Circles



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Videos, games, activities and worksheets to help ACT students review plane shapes - trapezoids, regular polygons and circles. How to find the area of trapezoids, regular polygons and circles?

What is the area formula for a trapezoid?
Area of a Trapezoid = 1/2(a + b)h, where a and b are the parallel sides and h is the perpendicular height

What is the area formula for a regular polygon?
Area of a regular polygon = 1/2pa, where p is the perimeter and a is the apothem. The apothem is the perpendicular segment drawn from a side to the center of the polygon.

What is the area formula for a circle?
Area of a circle = πr2, where r is the radius of the circle.

Area of Plane Figures - Trapezoids
Learn how to find the area of plane figures, particularly trapezoids.
Area of Plane Figures - Regular Polygons
Learn how to find the area of plane figures, particularly regular polygons.



Area of Plane Figures - Circles Part 1
Learn how to find the area of plane figure - circles
Area of Plane Figures - Circles Part 2
Learn how to find the area of plane figures, particularly circles.


Try the free Mathway calculator and problem solver below to practice various 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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