1. Side (base) of a right trapezoid if you know other base and midline of a trapezoid
, 
- bases
- midline
Calculate the side of a trapezoid if given middle line and other base ( a b ) :
2. Sides (bases) of a right trapezoid if you know lateral sides, angle at the base and other base
, - bases
- lateral side = height
- lateral side
- angle at the base
Calculate the base of a trapezoid if given lateral sides, angle at the base and other base ( a b ) :
3. Sides (bases) of a right trapezoid if you know diagonals, lateral side (height) and angle between the diagonals
, - bases
- lateral side = height
, 
- diagonals
, 
- angles between the diagonals
Calculate the side (base) of a trapezoid if given diagonals, lateral side (height) and angle between the diagonals ( a b ) :
* It is true in this case:
4. Sides (bases) of a right trapezoid if you know area of a trapezoid, lateral side (height) and other base
, - bases
- lateral side = height
- height
- area
Calculate the side (base) of a trapezoid if given area of a trapezoid, lateral side (height) and other base ( a b ) :
* It is true in this case:
