Question

A sail is in the form of a right triangle. The angle at its lower edge is 57o. Which is the size of the angle formed at the top of the sail?

Answer 1

is the illustration like this?

Answer 2

if it is:
first a triangle has the sum of 180o angle (meaning angle1 + angle2 + angle3 = 180)
second a RIGHT TRIANGLE has a 90o angle

therefore:
180 = 90 + 57 + x (where x is the 3rd angle)
x = 180 - 90 - 57
x = 33

[is it right?]