Find the area of any triangle with our Heron’s Formula Calculator! Just enter the side lengths—no need for height or angles—and get instant results with steps.

Use our Circumscribed Circle Calculator to find the inradius, circumradius, diameter, circumference, and area of the circumcircle—just from side lengths.

Classifying Triangles Calculator instantly identifies the type of triangle—based on side lengths or angles—with clear, step-by-step solutions!

Quickly verify right triangles with our Pythagorean Triples Calculator! Enter any three side lengths to check for a valid Pythagorean triple—with explanations.

Use our Triangle Inequality Theorem Calculator to quickly verify whether three given side lengths can form a valid triangle—by checking the essential inequality conditions—with clear, step-by-step explanations.

Solve right triangles instantly with our Special Right Triangles Calculator! Supports 45°-45°-90°, 30°-60°-90°, b = 2a, b = 3a, and 3x-4x-5x triangles.

Find missing sides, scale factors, and verify triangle similarity using SSS, SAS, or AA with our Similar Triangles Calculator—complete with solutions!

Solve any equilateral triangle in seconds with our Equilateral Triangle Calculator! Enter one value to find side length, area, perimeter, height, or angles.

Solve 45-45-90 triangles instantly with our 45 45 90 Triangle Calculator! Find legs, hypotenuse, height, area, or perimeter from any one known value with steps.

Solve 30-60-90 triangles effortlessly with our 30 60 90 Triangle Calculator! Find the sides, altitude, area, or perimeter from any one known value—with steps.