Q1. What is the third angle for the triangle where angle1 = 45° and angle 2 = 45° ?

45° 60° 90°

Q2. If a triangle has an angle of 90°, what is it called?

Acute Right angled Equilateral

Q3. Which of the following triangles are always similar?

Right triangle Obtuse triangle Equilateral triangle

Q4. Which ancient Greek philosopher studied triangles?

Plato Socrates Pythagoras

Q5. What is sum of exterior angles of any triangle?

180° 360° 540°