- Maths Help
- AlgebraToggle Dropdown
- DecimalsToggle Dropdown
- Place value
- Comparing and ordering decimals
- Rounding to a place
- Significant figures
- Standard form and engineering notation
- Adding decimals
- Subtracting decimals
- Multiplying decimals
- Dividing decimals
- Converting decimals to fractions
- Converting decimals to percents
- Converting between decimals, fractions and percents
- Ordering decimals, fractions and percents

- FractionsToggle Dropdown
- Understanding fractions
- Simplifying (reducing) fractions
- Equivalent fractions
- Comparing fractions
- Ordering fractions
- Mixed numbers and improper fractions
- Adding fractions
- Subtracting fractions
- Adding and subtracting mixed numbers
- Multiplying fractions
- Dividing fractions
- Multiplying and dividing mixed numbers
- Converting fractions to decimals
- Converting fractions to percents
- Converting between fractions, decimals and percents
- Ordering fractions, decimals and percents

- IntegersToggle Dropdown
- MeasurementToggle Dropdown
- Metric units of measure
- Perimeter of squares, rectangles and triangles
- Circumference of circles
- Area of squares, rectangles and triangles
- Area of circles
- Surface area of cubes, cuboids and triangular prisms
- Surface area of cylinders
- Volume of cubes, cuboids and triangular prisms
- Volume of cylinders, cones, spheres and pyramids

- PercentsToggle Dropdown
- StatisticsToggle Dropdown
- Trigonometry

A right triangle can have its right angle at the top.

- Study using trig ratios to find the length of a sideThis page from mathsisfun.com explains how to choose which trig ratio (sine, cosine or tangent) to use when you need to find the length of a side. There is also a set of interactive practice problems at the bottom of the page.
- Read about using sines, cosines or tangents to find the length of a sideRead about how to find an unknown side of a right angle triange.
- Quiz yourself on finding an unknown side length using trigDo you know how to find an unknown side length using sine, cosine and tangent? Check your understanding with this online quiz at mathopolis.com

Use these search terms to find your own resources:

*solving right triangles with trigonometry
solving right triangles with sines, cosines and tangents*