<2 = 39 degrees. Find m<4 and explain how you know. Drawing not to scale.
1 answer
m<4 = 75 degrees. This is because the angles in a triangle add up to 180 degrees. Since 2 degrees and 39 degrees add up to 41 degrees, the remaining angle must be 180 - 41 = 139 degrees. Since the angles are all less than 90 degrees, the remaining angle must be 75 degrees.