Use our Classifying Triangles Calculator to instantly determine the type of triangle based on three given values—whether side lengths or angles—with clear, step-by-step explanations using geometric rules and triangle theorems.
Use our Pythagorean Triples Calculator to instantly check whether three given side lengths form a valid right triangle—by applying the Pythagorean Theorem—with clear, step-by-step 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. Fast, accurate, and easy to use — Try it once!
Find missing sides, scale factors, and check triangle similarity using SSS, SAS, or AA with our Similar Triangles Calculator — with step-by-step solutions.
Use our Equilateral Triangle Calculator to find the side length, area, perimeter, height, or angle from any one known value, with step-by-step solutions.
Use our 45 45 90 Triangle Calculator to find the legs, hypotenuse, altitude (height), area, or perimeter from any one known value, complete with step-by-step solutions.
Use our 30 60 90 Triangle Calculator to find the short leg, long leg, hypotenuse, altitude (height), area, or perimeter from any one known value, with step-by-step solutions.
