https://www.khanacademy.org/math/geometry-home/geometry-area-perimeter/geometry-area-trap-composite/v/area-of-a-trapezoid-1 2023-04-15T06:42:38.642148315Z Area of trapezoids Area of a trapezoid is found with the formula, A=(a+b)h/2. To find the area of a trapezoid, you need to know the lengths of the two parallel sides (the "bases") and the height. Add the lengths of the two bases together, and then multiply by the height. Finally, divide by 2 to get the area of the trapezoid. Sal Khan video https://cdn.kastatic.org/googleusercontent/2Qf_I9kn1tNDqsjFdl-9bjcHfFsPAwH-C-Wl-UTQIxVSY-8daxkrR9NlhBsu4tE4JgvWXA32HaInnk33giWNBfC6 Area of trapezoids Area of a trapezoid is found with the formula, A=(a+b)h/2. To find the area of a trapezoid, you need to know the lengths of the two parallel sides (the "bases") and the height. Add the lengths of the two bases together, and then multiply by the height. Finally, divide by 2 to get the area of the trapezoid. https://cdn.kastatic.org/ka-youtube-converted/j3-XYLnxJDY.mp4/j3-XYLnxJDY.mp4 288 Mensuration https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-geometry/cc-7th-area-circumference/v/finding-radius-and-diameter-from-circumference 2022-10-06T11:16:59.256015857Z Radius & diameter from circumference Sal finds the radius and diameter of a circle given the circumference. video https://cdn.kastatic.org/ka_thumbnails_cache/812dd235-329d-4612-981f-073c8201c543_1280_720_base.png Radius & diameter from circumference Sal finds the radius and diameter of a circle given the circumference. https://cdn.kastatic.org/ka-youtube-converted/yWGeFDXgQvg.mp4/yWGeFDXgQvg.mp4 216 Mensuration https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-geometry/cc-7th-area-circumference/v/area-of-a-circle 2021-07-02T09:35:33Z Area of a circle The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter. Sal Khan video https://cdn.kastatic.org/googleusercontent/tdyoRNQvRjlFlBjMOD7spTi4S7SZ434tKeVqIjcudNOs4e9a3HV9o2MqX-WQiIpX1xn9Fw9CF7bnjtlUBXPjV9MH Area of a circle The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter. https://cdn.kastatic.org/ka-youtube-converted/ZyOhRgnFmIY.mp4/ZyOhRgnFmIY.mp4 242 Mensuration https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-geometry/cc-7th-area-circ-challenge/v/area-of-shaded-region 2020-09-16T18:09:55Z Area of a shaded region Here's a fun one: find the area of a shaded region where you first determine the area of a square and then the area of a circle. Sal Khan video https://cdn.kastatic.org/googleusercontent/ewA_GfGHFeHuh06YBoJCmdRj28PUnKIDRUCQjYZ22RvnNyhy2VgbJtg0HZn9btBBWDSibObwz9nJlscnpVnv8lmfiw Area of a shaded region Here's a fun one: find the area of a shaded region where you first determine the area of a square and then the area of a circle. https://cdn.kastatic.org/ka-youtube-converted/gbGghzo7yEM.mp4/gbGghzo7yEM.mp4 91 Mensuration https://www.khanacademy.org/math/revision-up-math-class-8/xe4edb0d90ad0a387:week-3-revision-up-math-class-8/xe4edb0d90ad0a387:mensuration-revision-up-math-class-8/e/revision-mensuration-up-math-class-8 2026-04-07T22:23:57.656416987Z Revision Mensuration Practice problems for revision of Mensuration. Satya Swaroop exercise