Scalene Triangle Calculator
Enter three unequal sides to get a scalene triangle's area by Heron's formula, all three angles, each altitude, perimeter, inradius and circumradius.
Triangles and Trigonometry
8 tools
Which Triangles and Trigonometry tool do you need?
| Tool | What it answers |
|---|---|
| Equilateral Triangle Calculator | In an equilateral triangle all three sides are equal and every angle is 60°. |
| Isosceles Triangle Calculator | An isosceles triangle with legs a and base b has height h = √(a² − (b/2)²) and area b × h ÷ 2. |
| Pythagorean Theorem Calculator | The Pythagorean theorem says that in a right triangle the square of the hypotenuse equals the sum of the squares of the two legs: a² + b² =… |
| Right Triangle Calculator | A right triangle is fixed by any two values that include a side. |
| Scalene Triangle Calculator | A scalene triangle has three different side lengths, so its area comes from Heron's formula: A = √(s(s − a)(s − b)(s − c)), where s is half… |
| Tangent Line to Circle Calculator | A tangent to a circle is perpendicular to the radius at the point where it touches. |
| Triangle Angle Calculator | A triangle's interior angles always add to 180°, so the third angle is 180° minus the two you know: with 50° and 60°, the missing angle is 70°. |
| Triangle Calculator | A triangle is fully determined by three sides (SSS), two sides and the angle between them (SAS), or two angles and the side between them (ASA). |
All tools
Pythagorean Theorem Calculator
Find the hypotenuse or a missing leg of a right triangle from a² + b² = c², plus its area, perimeter and both acute angles in degrees.
Isosceles Triangle Calculator
Find the area, perimeter, height and angles of an isosceles triangle from its leg and base, or from base and height. Legs 5, base 6 give an area of 12.
Equilateral Triangle Calculator
Find every measure of an equilateral triangle from one known value: side, height, area or perimeter, plus inradius and circumradius to four decimals.
Triangle Angle Calculator
Find a triangle's missing angle from two known angles, or all three angles from side lengths with the law of cosines, plus the triangle type.
Right Triangle Calculator
Solve a right triangle from two legs, a leg and the hypotenuse, or a leg and an angle. Returns the missing sides, both acute angles, area and perimeter.
Tangent Line to Circle Calculator
Find the tangent line equations from a point to a circle, the tangent length √(d² − r²), the points of tangency and the angle between the two tangents.
Triangle Calculator
Solve any triangle from three sides, two sides and the included angle, or two angles and a side. Returns area, perimeter, all angles and the height.