## Rule of three

Three simple ruleCompound Three Rule

## Periodic Tithes

Periodic TithesGenerator of a periodic tithe

## Percentage

Percentage and centesimal ratioMultiplication factor

## Flat geometry

Areas of the flat figuresPolygons

## Surface measurements

Introduction, Surface and Area, Square MeterUnit Transformation

## Volume measurements

Introduction, Cubic MeterUnit Transformation

## Capacity measurements

Introduction, capacity and literUnit Transformation

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## Mass measurements

Introduction, KilogramMass measurement reading

Unit Transformation

## Time measurements

Introduction, Second, Second MultiplesOther units of measure

## Length measurements

Decimal metric system, meterReading length measurements

Unit Transformation

Polygon perimeter

Circumference Length

## 2nd degree equations

What is a 2nd degree equation?Roots of a 2nd degree equation

Solving Incomplete Equations

Resolution of complete equations

Discriminator

Literal equations

Relations between coefficients and roots

Composition of a 2nd degree equation

Factored form

Beamed Equations

Solving a Balanced Equation

Composition of the equation

Irrational equations

Systems of equations of the 2nd degree

High School Problems

Another examples