Right Triangle Calculator
Calculate all elements of a right triangle.
Select calculation mode
Visualization
Hypotenuse
—
c = √(a² + b²)
Leg A
0,00
Leg B
0,00
Hypotenuse
0,00
Angles
α
36.8699°
β
53.1301°
γ
90°
Area
0,00
Perimeter
0,00
Inradius
0,0000
Circumradius
0,0000
Trigonometric Ratios
sin(α) = 0.6
cos(α) = 0.8
tan(α) = 0.75
sin(β) = 0.8
cos(β) = 0.6
tan(β) = 1.3333
What is a Right Triangle?
It's a triangle with one 90° angle. The side opposite the right angle is called hypotenuse; the other two are legs.
Trigonometry
sin = opposite/hypotenuse, cos = adjacent/hypotenuse, tan = opposite/adjacent. These relationships are fundamental.
Special Triangles
45-45-90: equal legs, hypotenuse = leg × √2. 30-60-90: sides in ratio 1:√3:2.
Preguntas Frecuentes
How do I identify the hypotenuse?
It's always the longest side and is opposite to the 90° angle.
What is the inradius?
It's the radius of the largest circle that fits inside the triangle, tangent to all three sides.
How do I use trigonometric ratios?
SOH-CAH-TOA: Sin=Opposite/Hypotenuse, Cos=Adjacent/Hypotenuse, Tan=Opposite/Adjacent.