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Grade 9 Math Study Notes

Advanced Mathematics for Junior High School

Course Overview

Grade 9 Mathematics introduces quadratic equations and functions, building on your algebra foundation. You'll also learn about variation relationships, radicals, triangle similarity, and the fundamentals of trigonometry with SOH-CAH-TOA.

5
Core Lessons
3.5 hrs
Total Study Time
K-12
Curriculum Aligned

What You'll Learn

Quadratic Equations

Four methods to solve any quadratic equation

Quadratic Functions

Graph parabolas and find vertex, axis of symmetry

Variation

Direct, inverse, joint, and combined variation

Radicals

Simplify, add, subtract, multiply, and rationalize

Triangle Similarity

AA, SSS, SAS similarity theorems

Trigonometry Basics

SOH-CAH-TOA and special right triangles

Study Tips for Grade 9 Math

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Master the Quadratic Formula

It works for every quadratic equation, so memorize it!

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Draw Triangles

Always label sides and angles when doing trigonometry.

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Connect Concepts

Quadratics, functions, and graphing are all related!

Memorize Special Triangles

45-45-90 and 30-60-90 appear everywhere in math.

Course Lessons

Ready to Test Your Knowledge?

Practice with our comprehensive Grade 9 Math quiz questions!

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