What is the third angle for the triangle where angle1 = 45° and angle2 = 45°?

45° 60° 90°

If a triangle has an angle of 90 degrees, what is it called?

acute obtuse right angled

Which of the following statements are true?

A scalene triangle has at least one obtuse angle
A triangle with three angles of 60 degrees is equilateral.
A right triangle has two right angles.

An isosceles triangle has a base angle whose measure if 40 degrees. What is the measure of the vertex angle?

120 100 40