Chapter 12
Shaping Up with Geometry
In This Chapter
Measuring quadrilaterals
Finding the area of a triangle
Using the Pythagorean theorem
Finding the area and circumference of a circle
Calculating the volume of a variety of solids
Geometry is the study of shapes and figures, and it's really popular with the Ancient Greeks, architects, engineers, carpenters, robot designers, and high school math teachers.
A shape is any closed two-dimensional (2-D) geometric figure that has an inside and an outside, and a solid is just like a shape, only it's three-dimensional (in 3-D). In this chapter, you work with three important shapes: quadrilaterals, triangles, and circles. I show you how to find the area and in some cases the perimeter (the length of the edge) of these shapes. I also focus on a variety of solids, showing you how to find the volume of each.
Getting in Shape: Polygon (And Non-Polygon) Basics
You can divide shapes into two basic types: polygons and non-polygons. A polygon has ...
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