Chapter 5

Plane Geometry

According to the official breakdown, almost 20 percent of Math 1 questions
are plane geometry questions. But that’s counting only the ones that are
explicitly and primarily plane geometry questions. In fact, plane geometry is
fundamental to solid geometry, coordinate geometry, and trigonometry. The
material in this chapter is relevant to nearly half of the Math 1 test.

PLANE GEOMETRY FACTS AND FORMULAS IN THIS CHAPTER

Line    segments

Triangles

Quadrilaterals  and polygons

Circles

Five    Facts   about   Triangles

Similar Figures

Three   Special Triangle    Types

Pythagorean Theorem

Four    Special Right   Triangles

Five    Special Quadrilateral   Types

Polygon Angles