Acute ( less than 90 degrees), Obtuse (more than 90 degress), Right (90 degrees), Straight (180 degrees), Reflex (more than 180 degrees)
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You classify a quadrilateral by its sides, angles, and its vertices.
A rhombus with 4 congruent angles is a rectangular rhombus having interior angles that are all right angles (90°) and therefore it is a square.
A rhombus has 4 congruent angles when its diagonals intersect each other at right angles otherwise it has a pair of opposite equal acute angles and a pair of opposite obtuse angles.
isosceles -2 equal sides, 1 other length side, 2 equal angles, 1 other angle scalene -all angles and sides different equilateral -all sides and angles same (angles always 60degrees)
All triangles have 3 sides and 3 interior angles that add up to 180 degrees and are classified as follows:- Right angle: 1 90 degree angle and 2 acute angles Obtuse: 1 obtuse angle and 2 acute angles Scalene: 3 acute angles Isosceles: 2 equal angles and another angle Equilateral: 3 equal angles each measuring 60 degrees