Answer:
?=38 degrees
Step-by-step explanation:
Lower triangle, left side, inside angle =50 degrees. (Opposite side angles)
Lower triangle, right side=30 degrees. (Supplementary angle)
lower triangle upper angle= 100 degrees. (180-50-30-100)
Upper triangle, lower angle=100 degrees. (Opposite angles)
Upper triangle, right side=180-100-42=38 degrees.
