Area of Circle, Triangle, Square, Rectangle, Parallelogram, Trapezium, Ellipse and Sector. Area is the size of a surface!

Learn more about Area, or try the Area Calculator. Example: What is the area of this rectangle? The formula is: Area = w × h w = width h = height We know w = 5 and h = 3, so: Introduction to Atomic Reactions. The three most common types of radioactive decay which are naturally occurring, are alpha, beta, and gamma radiation.

They were found when it was discovered that they responded differently in an electrical field. As can be seen in the graphic, to the left or above, this experiment is very simple. Registration.