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Triangle area calculator

Area of a triangle from its base and height, or from its three sides (Heron’s formula).

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Area 30

How it works

A = ½ × b × h · A = √(s(s − a)(s − b)(s − c))

With a base and the height measured at right angles to it, the area is half of base × height, because a triangle is half of a rectangle. With only the three sides, Heron’s formula works: s is half the perimeter, and the area is √(s × (s − a) × (s − b) × (s − c)). If one side is longer than the other two together, there’s no triangle.

  1. Half of base × height 10 × 6 ÷ 2 = 30

Printed from rocketcalc.io/geometry/triangle