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

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

Definition and properties of the central angle of a circle
Math Open Reference

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

Area of an annulus. Definition and formula
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
