Trigonometry AS : nrich.maths.org

Impossible Square?

Stage: 5 Challenge Level:

Can you make a square from these triangles?

Impossible Triangles?

Stage: 5 Challenge Level:

Which of these triangular jigsaws are impossible to finish?

Curved Square

Stage: 5 Challenge Level:

Can you find the area of the central part of this shape? Can you do it in more than one way?

Tangled Trig Graphs

Stage: 5 Challenge Level:

Can you work out the equations of the trig graphs I used to make my pattern?

Weekly Challenge 3: Geometric Trig

Stage: 5 Short Challenge Level:

A weekly challenge concerning trigonometry, circles and triangles.

Weekly Challenge 5: Trigger

Stage: 5 Short Challenge Level:

A weekly challenge: these are shorter problems aimed at Post-16 students or enthusiastic younger students.

Weekly Challenge 23: Stand up Arcs

Stage: 4 and 5 Short Challenge Level:

A weekly challenge: these are shorter problems aimed at Post-16 students or enthusiastic younger students.

Calculating with Cosines

Stage: 5 Challenge Level:

If I tell you two sides of a right-angled triangle, you can easily work out the third. But what if the angle between the two sides is not a right angle?