# Class IX maths

Here is a list of all of the maths skills students learn in class IX! These skills are organised into categories, and you can move your mouse over any skill name to preview the skill. To start practising, just click on any link. IXL will track your score, and the questions will automatically increase in difficulty as you improve!

## Numbers

## Operations

- B.1 Add, subtract, multiply and divide integers
- B.2 Evaluate numerical expressions involving integers
- B.3 Evaluate variable expressions involving integers
- B.4 Add and subtract rational numbers
- B.5 Multiply and divide rational numbers
- B.6 Evaluate numerical expressions involving rational numbers
- B.7 Evaluate variable expressions involving rational numbers

## Ratios, rates and proportions

## Percents

## Measurement

## Lines and angles

## Triangles

- G.1 Classify triangles
- G.2 Triangle angle-sum property
- G.3 Exterior angle property
- G.4 Exterior angle inequality
- G.5 Angle-side relationships in triangles
- G.6 Triangle Inequality Theorem
- G.7 Midsegments of triangles
- G.8 SSS, SAS and ASA Theorems
- G.9 SSS Theorem in the coordinate plane
- G.10 Congruency in isosceles and equilateral triangles
- G.11 Hypotenuse-Leg Theorem

## Quadrilaterals

## Polygons

## Area and perimeter

## Circles

- L.1 Parts of a circle
- L.2 Central angles
- L.3 Arc measure and arc length
- L.4 Area of sectors
- L.5 Circle measurements: mixed review
- L.6 Arcs and chords
- L.7 Tangent lines
- L.8 Perimeter of polygons with an inscribed circle
- L.9 Inscribed angles
- L.10 Angles in inscribed right triangles
- L.11 Angles in inscribed quadrilaterals

## Constructions

## Solve equations

- N.1 Model and solve equations using algebra tiles
- N.2 Write and solve equations that represent diagrams
- N.3 Solve one-step linear equations
- N.4 Solve two-step linear equations
- N.5 Solve advanced linear equations
- N.6 Solve equations with variables on both sides
- N.7 Solve equations: complete the solution
- N.8 Find the number of solutions
- N.9 Create equations with no solutions or infinitely many solutions
- N.10 Solve linear equations: word problems
- N.11 Solve linear equations: mixed review

## Data and graphs

## Problem solving

## Coordinate plane

## Direct variation

## Linear equations

- T.1 Identify linear equations
- T.2 Find the slope of a graph
- T.3 Find the slope from two points
- T.4 Find a missing coordinate using slope
- T.5 Slope-intercept form: find the slope and y-intercept
- T.6 Slope-intercept form: graph an equation
- T.7 Slope-intercept form: write an equation from a graph
- T.8 Slope-intercept form: write an equation
- T.9 Slope-intercept form: write an equation from a table
- T.10 Slope-intercept form: write an equation from a word problem
- T.11 Linear equations: solve for y
- T.12 Write linear equations to solve word problems
- T.13 Compare linear equations, graphs and tables
- T.14 Write equations in standard form
- T.15 Standard form: find x- and y-intercepts
- T.16 Standard form: graph an equation
- T.17 Equations of horizontal and vertical lines
- T.18 Graph a horizontal or vertical line
- T.19 Slopes of parallel and perpendicular lines
- T.20 Write an equation for a parallel or perpendicular line

## Exponents

- U.1 Exponents with integer bases
- U.2 Exponents with decimal and fractional bases
- U.3 Negative exponents
- U.4 Multiplication with exponents
- U.5 Division with exponents
- U.6 Multiplication and division with exponents
- U.7 Power rule
- U.8 Evaluate expressions using properties of exponents
- U.9 Identify equivalent expressions involving exponents

## Rational exponents

## Logarithms

- W.1 Convert between exponential and logarithmic form: rational bases
- W.2 Evaluate logarithms
- W.3 Change of base formula
- W.4 Identify properties of logarithms
- W.5 Product property of logarithms
- W.6 Quotient property of logarithms
- W.7 Power property of logarithms
- W.8 Properties of logarithms: mixed review
- W.9 Evaluate logarithms: mixed review

## Scientific notation

## Monomials

## Polynomials

- Z.1 Polynomial vocabulary
- Z.2 Model polynomials with algebra tiles
- Z.3 Add and subtract polynomials using algebra tiles
- Z.4 Add and subtract polynomials
- Z.5 Add polynomials to find perimeter
- Z.6 Multiply a polynomial by a monomial
- Z.7 Multiply two polynomials using algebra tiles
- Z.8 Multiply two binomials
- Z.9 Multiply two binomials: special cases
- Z.10 Multiply polynomials
- Z.11 Write a polynomial from its roots
- Z.12 Find the roots of factorised polynomials

## Factorising

- AA.1 HCF of monomials
- AA.2 Factorise out a monomial
- AA.3 Factorise quadratics with leading coefficient 1
- AA.4 Factorise quadratics with other leading coefficients
- AA.5 Factorise quadratics: special cases
- AA.6 Factorise quadratics using algebra tiles
- AA.7 Factorise by grouping
- AA.8 Factorise polynomials

## Quadratic equations

- BB.1 Characteristics of quadratic equations
- BB.2 Complete a table: quadratic equations
- BB.3 Solve a quadratic equation using square roots
- BB.4 Solve a quadratic equation using the zero product property
- BB.5 Solve a quadratic equation by factorising
- BB.6 Solve a quadratic equation using the quadratic formula

## Radical expressions

- CC.1 Roots of integers
- CC.2 Roots of rational numbers
- CC.3 Find roots using a calculator
- CC.4 Nth roots
- CC.5 Simplify radical expressions with variables I
- CC.6 Simplify radical expressions with variables II
- CC.7 Multiply radical expressions
- CC.8 Divide radical expressions
- CC.9 Add and subtract radical expressions
- CC.10 Simplify radical expressions using the distributive property
- CC.11 Simplify radical expressions using conjugates