Summarize this article in one sentence.
You will begin to learn irrational numbers: numbers that can be written as decimals, numerals, or fractions. You can quiz yourself on converting them to each. Figuring out a square root of a perfect square begins in high school. If you multiply a number by itself then you create a perfect square. A square root is the original number. High school will teach you how to solve and graph equations. Be prepared to learn how read a graph. High school mathematics is the start of learning algebra. A function is the relationship of a variable to another variable in algebra. It is the rule that can give the value of a missing variable. For example 2x=y is a function where x and y are variables. You will learn how to calculate sizes of shapes using different equations like Pythagorean theorem (a2 + b2 = c2) to find the lengths of the sides of right angle triangles. You will also learn how to find the volume of cones, spheres, and cylinders. You will begin to learn how to solve word problems and how to apply math to solving real world scenarios.

Summary:
Learn rational numbers. Know perfect squares. Familiarize yourself with graphs. Understand what a function is. Determine sizes of shapes. Understand how math applies to the real world.