# Math Help - Overlapping Triangles. Trick Question?

1. ## Overlapping Triangles. Trick Question?

This is on my homework sheet. Still can't figure it out :S... Help?

Find L-D to 5 Decimal Places:

- Donny

2. Looking at the bottom triangle, you can see that:

$\cos 50^{\circ} = \frac{\text{LD}}{\text{LR}} = \frac{\text{LD}}{80 \text{ cm}}$

Assuming you can use a calculator, then: $\text{LD} = 80 \text{ cm} \times \cos 50^{\circ}$