Angle of Right Triangle Calculator

Your details

The leg opposite angle alpha.
The leg opposite angle beta.
Angle alpha (alpha)Scalene right triangle
36.8699deg

Acute angle opposite leg a

Angle beta (beta)53.1301deg
Leg a3
Leg b4
Hypotenuse c5
Altitude h2.4
Area6
Perimeter12

Angle alpha = 36.8699 deg, angle beta = 53.1301 deg

  • The two acute angles are 36.8699 deg and 53.1301 deg and they always sum to exactly 90 deg.
  • By the Pythagorean theorem, the hypotenuse is 5.0000, confirming a^2 + b^2 = c^2: 25.0000 = 25.0000.

Next stepUse the sine rule or cosine rule to verify your results, or enter different known values using the mode selector above.

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