Move points A, B, and C to make an acute triangle.[br][br]How many acute angles does your triangle have? Do you think this is true for all acute triangles?
Move points A, B, and C to make an obtuse triangle.[br][br]How many obtuse angles does your triangle have? Could you make a triangle with more than one obtuse angle?
Move points A, B, and C to make a right triangle.[br][br]How many 90° angles does your triangle have? Could you make a triangle with more than one 90° angle?