Answer:
option B
Step-by-step explanation:
Given: the measurement of angles x and z are 60 and 43 respectively
Sum of angles in a triangle is 180 degree
∠x +∠y+∠z= 180
60 +∠y+43= 180
∠y+103=180 (subtract 103 from both sides)
∠y=77
Angle y is the biggest angle , the side opposite to the biggest angles is the longest side
The side opposite to ∠y is XZ
So the longest side is side XZ
