# Geometry: Shapes and Formulas

These lessons, with videos, examples and step-by-step solutions, help students learn the basic geometry formulas for areas, perimeters, circumferences, volumes and surface areas of common shapes.

The following diagram shows the Geometry Formulas for perimeter, circumference, area, surface area, and volume. Scroll down the page for more examples and solutions using the geometry formulas.

The following videos will describe the common geometrical shapes and the corresponding formulas to calculate their area and perimeter. The videos also include the use of the Pythagorean Theorem and Heron’s formula.

Perimeter and area of triangles, rectangles, and trapezoids

Area of triangles including Heron’s Formula. Pythagorean Theorem. Area and circumference of circle

Surface Area of Circular Solids (cylinders, cones, spheres)

Area and Circumference of circle. Solve word problems involving perimeter, area and right triangles

A lesson on the basic formulas of geometry, including area and perimeter of rectangles, squares, circles and triangles

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.