- Volume Calculator
- Area Calculator
- Perimeter Calculator
- Surface Area Calculator
- Circle Calculator
- Rectangle Calculator
- Triangle Calculator
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Right Triangle Legs from Hypotenuse and Angle CalculatorFind both legs of a right triangle from the hypotenuse and an acute angle. Computes opposite = c·sinθ and adjacent = c·cosθ instantly.
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Right Triangle CalculatorSolve a right triangle from two sides: find the missing side, perimeter, area, all three altitudes and interior angles using the Pythagorean theorem.
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Law of Sines CalculatorSolve a triangle with the Law of Sines: find a missing angle or side, then get all sides, all angles, perimeter, area, inradius and circumradius.
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Isosceles Triangle CalculatorEnter the equal leg a and base b of an isosceles triangle to compute the third side, perimeter, semiperimeter, area and all three altitudes instantly.
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Triangle Theorems Calculator (AAA, AAS, ASA, ASS/SSA, SAS, SSS)Solve any triangle from AAA, AAS, ASA, ASS/SSA, SAS or SSS inputs. Get all angles, sides, perimeter, area, inradius and circumradius instantly.
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Law of Cosines CalculatorSolve any triangle with the Law of Cosines. Enter three sides (SSS) to find all angles, perimeter, area, inradius and circumradius instantly.
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Pythagorean Theorem CalculatorSolve the Pythagorean theorem a² + b² = c² for any missing side of a right triangle (leg a, leg b, or hypotenuse c) and get the area instantly.
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Area of Triangle with Coordinates CalculatorFind the area of a triangle from the coordinates of its three vertices using the shoelace formula. Enter (x,y) points and get the exact area instantly.
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Triangle Area CalculatorCalculate triangle area easily with base and height inputs. Get accurate results for your geometry problems and mathematical calculations with this simple and efficient triangle area calculator.
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Triangle CalculatorTriangle Calculator
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Trig Triangle CalculatorSolve a triangle from two sides and the included angle (SAS) using the law of cosines and law of sines. Finds the third side, angles, area, and perimeter.
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Solve Similar Triangles CalculatorSolve similar triangles instantly. Enter the sides of triangle 1 and one matching side of triangle 2 to find the scale factor k and the remaining sides.
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Law of Sines Triangle CalculatorSolve a triangle with the Law of Sines. Enter side a, angle A and angle B to find angle C, sides b and c, plus perimeter and area.
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Similar Right Triangles CalculatorCalculate the altitude and legs of a right triangle using the geometric mean relationships from the two hypotenuse segments p and q.
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Scalene Triangle CalculatorCalculate the area, perimeter, angles and altitudes of a scalene triangle from its three sides using Heron's formula and the law of cosines.
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Scalene Triangle Area CalculatorFind the area of a scalene triangle from its three sides using Heron's formula. Enter sides a, b and c to get area, perimeter and semi-perimeter instantly.
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SAS Triangle CalculatorSolve a triangle from two sides and the included angle (SAS). Find the third side with the Law of Cosines, plus area and remaining angles.
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Right Triangle Trigonometry CalculatorSolve a right triangle from its two legs: get the hypotenuse, sin, cos, tan, both acute angles, area and perimeter instantly with steps.
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Triangle Side and Angle CalculatorSolve a triangle from two sides and the included angle (SAS). Find the third side, remaining angles, perimeter and area using the Law of Cosines and Sines.
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Triangle Ratio CalculatorFind all three triangle side lengths from a ratio a:b:c and one known side. Proportional scaling gives each side plus the perimeter instantly.
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Triangle Scale Factor CalculatorFind the scale factor between two similar triangles from a pair of corresponding sides, then scale any other side and the area instantly.
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Triangle Sum Theorem CalculatorFind the missing third angle of a triangle using the Triangle Sum Theorem (A + B + C = 180°). Enter two known angles to get the third instantly.
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Theta (Angle) CalculatorCalculate the angle theta (θ) of a right triangle from its opposite and adjacent sides using atan2. Get the result in degrees and radians instantly.
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Tangent Ratio CalculatorCalculate the tangent ratio of an angle in a right triangle from the opposite and adjacent sides, plus the angle in degrees. Free trig tool.
