Area of a Right Triangle Calculator

Your details

Choose the pair of values you already know. The calculator solves for everything else.
One of the two shorter sides that form the right angle.
m
The other shorter side that forms the right angle.
m
Area
6

Area of the right triangle

Area unitm^2
Leg a3
Leg b4
Hypotenuse c5
Altitude h2.4
Perimeter12
Angle beta36.87deg

Area = 6.0000 m^2

  • The hypotenuse is 5.00 (the unit you entered), the longest side opposite the right angle.
  • The altitude from the right angle to the hypotenuse is 2.40, which also equals 2 x area / hypotenuse.
  • The two legs are in the ratio 3.00 : 4.00, which defines the triangle's shape.
  • Your triangle is a scaled Pythagorean triple, meaning all three sides are in a ratio of whole numbers.
  • Area = (leg a x leg b) / 2 = (3.00 x 4.00) / 2 = 6.00 m^2.

Next stepTo find the perimeter, add all three sides: a + b + c. To find a missing angle, use arctan(opposite / adjacent).

 = Powered by OnlyCalculators