Triangle Calculators

Pythagorean Theorem Calculator

Calculate hypotenuse, area, perimeter, and angles from right triangle legs

Pythagorean Triples Calculator

Find hypotenuse, perimeter, area, angles, and triple properties

30 60 90 Triangle Calculator

Find every key measurement in a 30 60 90 triangle

45 45 90 Triangle Calculator

Find equal sides, hypotenuse, area, and perimeter instantly.

Heron's Formula Calculator

Calculate triangle area using three known side lengths

Perimeter of a Triangle Calculator

Find triangle perimeter from three side lengths quickly and accurately

Similar Triangles Calculator

Find corresponding sides, scale factor, angles, perimeters, and areas

Hypotenuse Calculator

Find the longest triangle side from two perpendicular legs

Circumscribed Circle Calculator

Find a triangle’s circumcircle measurements from its three sides

Classifying Triangles Calculator

Identify triangle types from side lengths and angle measures

Special Right Triangles Calculator

Solve side lengths, area, perimeter, and angles effortlessly

Equilateral Triangle Calculator

Calculate equilateral triangle measurements quickly and accurately

Right Triangle Calculator

Calculate hypotenuse, angles, area, perimeter, and altitude from two legs.

Right Triangle Side and Angle Calculator

Calculate right triangle angles, hypotenuse, area, and perimeter from two legs

Triangle Angle Calculator

Find all triangle angles from three known side lengths

Triangle Area Calculator

Find triangle area quickly from base and perpendicular height

Triangle Height Calculator

Find triangle altitude from base length and area

Triangle Inequality Theorem Calculator

Test side lengths against all triangle inequality conditions

Isosceles Triangle Calculator

Find sides, angles, area, perimeter, and radii of isosceles triangles.

Area of a Right Triangle Calculator

Find triangle area from perpendicular base and height measurements