This page gives two methods for finding the area of a kite: a geometry formula and a trigonometric formula. Numerous connected pages offer a wide variety of information on all types of polygons.
Math Open Reference

Worksheet to practice calculating surface area for rectangular prisms.
Helping with Math

Worksheet to practice using the formula for the area of a circle.
Helping with Math

The worksheets below can be used as part of extra math homework. These geometry worksheets are free and easily printable. They cover typical school work from grade 4 through 8. They include questions on polygons, 3D objects, angles, and calculations of area, volume, etc.
Helping With Math.com

Comprehensive list of formulas for finding the area, volume and surface area of various shapes.
Math2

Formulas with corresponding pictures, help tutors and student review all the area fomula of plane shapes
Math is fun

In this Early Edge video lesson, you'll learn more about Surface Area, so you can be successful when you take on highschool Math & Geometry.
The Princeton Review

In this Early Edge video lesson, you'll learn more about Area of a Circle, so you can be successful when you take on highschool Math & Geometry.
The Princeton Review

Area enclosed by a circle. Definition and formula
Math Open Reference

This website will help you with squares and their properties. Such as side length, diagonal length, area and perimeter.
WebMath
