u say wether its an accute or obtuse or whateva kind of angle it is!
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no, pentagons don't have parallel sides or right angles.
Perpendicular.
Parallelogram -- 2 pairs of parallel sides Trapezoid -- exactly 1 pair of parallel sides Rhombus -- 4 congruent sides Rectangle -- 4 angles congruent Square -- four angles and sides congruent
congurent angles are angles that have equal angles. Example, if you want to have equal angles, you have to have a shape that has equal sides
All right angles are congruent.All straight angles are congruent.All zero angles are congruent.All the angles of a regular polygon are congruent.Vertical angles (the angles opposite one another when two lines intersect) are congruent.When a transversal crosses parallel lines:Corresponding angles are congruent.Alternative Interior angles are congruent.Alternative Exterior angles are congruent.Finally, any angles with the same measure are congruent.