Trig can look really scary in 3D….but if you keep calm and simplify it by drawing it as 2D shapes you’ll be rewarded with an A*.

**Example:** ABCDEFGH is a cuboid with dimensions 8cm, 6cm and 5cm.

- Find AC

To do this sketch the base of the cuboid and draw the line AC.Now you can see to find AC you have a simple Pythagoras problem.

AC2 = AB2 + BC2

AC2 = 82 + 62

AC2 = 100

AC = 10 cm

- Find AG

For this draw triangle ACG.So again you have Pythagoras.

AG2 = AC2 + CG2

AG2 = 102 + 52

AG2 = 125

AG = 11.18cm (2 d.p.)

- Find angle GAC

Now trigonometry comes into play!tanθ = 5/10

i.e θ = 26.57° (2 d.p.)