Area of an Obtuse Triangle Calculator

Your details

Choose the method that matches the measurements you already have.
The length of the base of the triangle.
units
The perpendicular height dropped from the opposite vertex to the base line (which may fall outside the triangle for an obtuse triangle).
units
Area
30sq units

Area of the obtuse triangle

Triangle typeObtuse (height falls outside the base)
Area30
Perimeter-

Area = 30.0000 square units

  • The area was calculated using base and height.
  • Triangle classification: Obtuse (height falls outside the base).
  • For an obtuse triangle, the perpendicular height always falls outside the triangle boundary when dropped from the vertex at the obtuse angle to the opposite base.

Next stepIf you want to find the angles or all three sides as well, try a full obtuse triangle solver that applies the law of sines and cosines to every unknown.

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