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Quadrangles Map, when the angles are all 90° - Coggle Diagram

- - - - Each internal angle is 90°. Opposite sides are parallel and of equal length.
        
        when all sides have equal length
  - - - The parallel sides are the "bases".
        The other two sides are the "legs".
        The distance (at right angles) from one base to the other is called the "altitude"
        
        when it has equal angles from a parallel side or equal legs
        
        Isosceles Trapezoid
        
        When the equal angles are 90°
  - - - Opposite sides are parallel. Opposite sides are equal in length. Opposite angles are equal (angles "a" are the same, and angles "b" are the same)
        
        When a=b=90°
  - - - Two pairs of sides.Each pair is two equal-length sides that are adjacent (they meet).The angles are equal where the two pairs meet
        
        When all sides have equal length
- - - - All sides are equal in length.
        Each internal angle is 90°.
        Opposite sides are parallel.
        
        is a