Answer:
Step-by-step explanation:
Since all the angles of triangle add up to 180 degrees,
Missing angle +100 +43=180.
Let the missing angle be 'x'.
Then, x + 100 +43 =180
or, x + 143 = 180
or, x = 180 - 143 = 37 degrees
So, the next angle is 37 degrees
