Question

Isosceles triangle that is not a right triangle

scalene triangle that is not a right triangle
A triangle has angle measures of 18° and 57°. What is the measure of the third angle?

Answer 1

Explanation:

always remember : the sum of all angles in a triangle is always 180°.

so, when we know 2 angles, we can easily calculate the third. in our case :

180 - 18 - 57 = 105°