Geometry Calculator
Area and perimeter (or surface area/volume) for common shapes.
Result
Area40
Perimeter26
Geometry Calculator — FAQs
How do I find area?
Rectangle: a×b. Triangle: ½bh. Circle: πr². Trapezoid: ½(a+b)h. Sphere: 4πr² surface, (4/3)πr³ volume.
Trapezoid area?
½(a+b)×h — average of the parallel sides times height.
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