Triangle Calculator

Calculate area, angles, heights, perimeter, inradius, and circumradius of any triangle from three sides.

Side a

Side b

Side c

Area

17.32

Perimeter20

Triangle TypeScalene Acute

Angle A38.21°

Angle B60°

Angle C81.79°

Height from A6.93

Inradius1.73

Circumradius4.04

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Formula

A = √(s(s-a)(s-b)(s-c)) where s = (a+b+c)/2

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