Week 10 MAE

Week 10 MAE

Non-right angled trigonometry

Briefly review what he have seen this week on non-right angled trigonometry:

https://docs.google.com/presentation/d/1oJ4nGefP-5Ap3IA4rCJidE-B8nwQwedwAKYCxG09xGM/edit?usp=sharing

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Find the surface area of tetrahedron ABCD when all of the faces are equilateral triangles with side length 10 cm (3 s.f.).

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Find the value of x when the area of this triangle is $5\sqrt{3}$ (answer to 1 s.f.) 

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Find the value for the angle (3 s.f.)

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A pole, BD, is attached to point C by two wires as shown. How far is point C from the base of the pole? (3 s.f.)