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This page contains information on the crucial skills to do well in this assessment. You will learn about in skill in class, however to compliment your learning you can watch each tutorial video and attempt the accompanying worksheets. Each worksheet has answers for you to check your work.
Labelling Your Triangle
Labelling Your Triangle
To use the following formulas accurately in this topic you need to know how to properly label your triangles. If the three side lengths of a triangle are "a", "b" and "c" then respectively the angles opposite those sides lengths will be "A", "B" and "C". The picture to the right illustrates what this will look like. Essentially a side length and the angle opposite it share the same letter - lower case for the side length, upper case for the angle.
All the formulas in this topic use this labelling method.
Sine Rule for Area
Sine Rule for Area
To use this rule you need to know:
Two side lengths ("a" and "b")
The angle between those two side lengths ("C")
The formula is given as:
Sine Rule for Area.pdfCosine Rule for Length
Cosine Rule for Length
To use this rule you need to know:
Two side lengths ("b" and "c")
The angle between those two side lengths ("A")
Cosine Rule for Length.pdfCosine Rule for Angle
Cosine Rule for Angle
To use this rule you need to know:
Three side lengths ("a", "b" and "c")
Cosine Rule for Angle.pdfSine Rule for Length
Sine Rule for Length
To use this rule you need to know:
A side length and angle pair (e.g. "a" and "A")
The angle opposite the side you're trying to find
Sine Rule Lengths.pdfSine Rule for Angle
Sine Rule for Angle
To use this rule you need to know:
A side length and angle pair (e.g. "a" and "A")
The side length opposite the angle you're trying to find
Sine Rule for Angle.pdfPage updated
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