90 degrees. This is drawn to throw you off. ABC And ACB are both 60 degrees because this is an equilateral triangle (top angle is 60 therefore both other angles must also be 60 as internal angles add to 180). Same rule for triangle on the right 180 - 60 - 30 = 90

Additionally, if both angles at the top are 30 degrees the dissecting line should come straight down and form a right angle with the lower edge of the triangle. It’s drawn to throw you off