<h3>
First Method:</h3>
<u>Using cosine rule</u>:




<h3>
Second Method:</h3>
<u>First find XY using sine rule</u>:



Then use Pythagoras Theorem:
⇒ XY² + YZ² = XZ²
⇒ (6)² + YZ² = 12²
⇒ YZ² = 144 - 36
⇒ YZ = √108
⇒ YZ = 6√3
⇒ YZ = 10.4
Yeah you did them all correct. (love your handwriting btw. its better than mine lol)
Answer:
(-2+4)/2
= 1
(-4-8)/2
= -6
(1,-6) is the midpoint of the line