Answer:
h = 55
Step-by-step explanation:
Each of the angles adjacent to 2h° on the straight line = (180° - 2h°)
We also know that all internal angles of a triangle add up to 180
Hence,
40 + (180-2h) + (180-2h) = 180
40 + 180 -2h + 180 - 2h = 180
220 -4h = 0
4h = 220
h = 55
