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Triangles HOME  Achievement Criteria  Pythagoras  Trigonometry  Area  Sin Rule  Cosine Rule  Revision 
2 
Trigonometry Using trigonometry to find the length of a side in a right angle triangle. Finding the size of an angle in a right angle triangle 
p402 Ex 28.01 find side p414 Ex 29.01 
3 
Applications & trigonometry practice Solving Pythagoras and trigonometric application problems including elevation & depression problems, nagigation and berings Trigonometry
Khan Academy Trigonometry Video Iintroduction, Example, Another Example 
p412 Ex 29.01 3D Situations, p416 Ex 29.02 
1)
Label
triangle 2) Cross of the irrelevant side 3) Select trig rule 4)Substitute in known values 5)Cover unknown & solve 6)Working rounding units Mouseover key words 
1) Label triangle2) Select trig rule3) Inverse function4) Working & AnswerMouseover key words 
A boat sails from port on a
bearing of 058 for 4.8 km

Form a
triangle
Which trig rule? Answer Mouseover key words 
A boat sails from port North
for 2.8 km, then west for 4km What is the bearing back to port now? 

Form a
triangle
Which trig rule? Working Answer Mouseover key words 
Pythagoras in a 3D shape with right
angles Find length EC Find base Diagonal Answer Mouseover key words 
Trig in a 3D shape with right angles Find Angle CEG Find base Diagonal Find Angle Review Mouseover key words 
The projection of a
line AG onto a plane Plane EFGH Plane CDHG Plane ADHE Plane ABCD Plane BCGF Mouseover key words 