burgerandcheese
Junior Member
- Joined
- Jul 2, 2018
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- 85
O is the origin
How did they get that 1/2 ?? because it's not from similar triangles
TIA
Argand diagram
- Thread starter burgerandcheese
- Start date
O is the origin
How did they get that 1/2 ?? because it's not from similar triangles
TIA
pka
Elite Member
- Joined
- Jan 29, 2005
- Messages
- 11,986
\(\displaystyle (z+4)+(z-4)=2z\)
\(\displaystyle \tfrac{1}{2}(2z)=z\)
So \(\displaystyle z=\tfrac{1}{2}[(z+4)+(z-4)]\)