Lets check your understanding with triangles

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

acute obtuse right-angled

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

fourtyfive sixty ninety

What is an "acute" angle?

Angle that measure 180 Angle that measure 90 Angle that measure < 90

What is an "obtuse" angle?

Angle that measure 180 Angle that measure 90 Angle that measure > 90

What is reflex angle?

angle between 180 & 360 angle between 90 &360 angle between 0 & 270