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.
Learn how to find the area of plane figures, particularly regular polygons.
Learn how to find the area of plane figure - circles
Learn how to find the area of plane figures, particularly circles.
Try out our new and fun Fraction Concoction Game.
Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.
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