Triangles are classed as: scalene, right angle, obtuse, isosceles and equilateral
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You can classify triangles by:Whether one of their angles is greater than 90 degrees, equal to 90 degrees, or all angles are less than 90 degreesWhether they have two or three congruent angles (equivalent to having two or three congruent sides)I think that's about it.
a quadrilateral or a parallelogram.
they might be different types of triangles.
Yes, I can.
two isosceles triangles with common line