Veronica has a lawn, ABCD. She has placed a watering hose, BD, as shown below.

Part A: Veronica plans to put a fence along the length AD of her lawn. What is the length of the fence required?
Part B: Using complete sentences, explain how you arrived at the answer for Part A.

Question

Veronica has a lawn, ABCD. She has placed a watering hose, BD, as shown below.
 

 
Part A: Veronica plans to put a fence along the length AD of her lawn. What is the length of the fence required? 
Part B: Using complete sentences, explain how you arrived at the answer for Part A.

anonymous · Answer

attachment

anonymous · Answer

Using pythagoras,
BD^2=DC^2+BC^2
use this to get length of BD,
then, AD=BD*tan60 (using trignometry)

anonymous · Answer

i mean AD=BD/tan60

anonymous · Answer

can you help me plug in the numbers

anonymous · Answer

sure.. BD^2= 28^2 + 21^2=784+441=1225=35^2
hence,BD=35

anonymous · Answer

then, AD=35/(1.732)  =20.207