The sum of the three interior angles of a triangle is 180 degrees. (there can be more than 1 answer) a.) x · y · z = 180° b.) x + y + z = 180° c.) 3a = 180° d.) a + 55° + 36° = 180° e.) x³ = 180°

It can be b), c) and d).

b) because it says the sum of three angles — this one’s the most obvious, as we can look at x, y and z as three different angles that sum up to 180.

c) works because 3a is, in essence, a + a + a, which we can look at as the sum of 3 angles that adds up to 180.

d) because we already have 2 angles, and “a” is just an unknown angle. It all sums up to 180.

a) and e) dont work because they involve multiplying (x*y*z and x*x*x) and the problem says we need to look for the sum of angles, not the product. :)