TREETL
Classroom Math//v1.0/Learn something

Circle Area

Area of a circle from its radius.

Result

Area

78.539816

25π

In terms of π

  1. 1Area = π × r²
  2. 2π × 5² = π × 25 = 78.539816
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About this instrument

Enter the radius to find the area of a circle using A = πr².

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Tool path

Where this fits

Part of a path: Learn something.

3 connected tools
Step 1

Circle Area

Area of a circle from its radius.

Open
Step 2

Triangle Area

Area of a triangle from base and height.

Open
Step 3

Pythagorean Theorem

Find a missing side of a right triangle.

Open
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