Plane Geometry Calculators

Circle Area and Circumference Calculator

Calculates the area and circumference of a circle from a given radius …

Ellipse Area and Perimeter Calculator

Calculates the exact area and approximate perimeter of an ellipse give…

Pythagorean Theorem Calculator

Calculates the unknown side of a right triangle given any two sides us…

Regular Polygon Calculator

Calculates the perimeter, area, interior angle, exterior angle, apothe…

Rhombus Calculator

Calculate the area, perimeter, diagonals, and angles of a rhombus from…

Trapezoid Area Calculator

Calculates the area of a trapezoid given its two parallel bases and he…

Triangle Area Calculator

Calculates the area of a triangle using base and height, three sides (…