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Which quadrilaterals do not have parallel sides?
Quadrilaterals usually have special names only if they DO have parallel sides, or some other special property. You might just call it "quadrilateral", or "a quadrilateral with no parallel sides".
Can a trapezoid have 3 bases?
No, a trapezoid cannot have 3 bases. A trapezoid is a quadrilateral with exactly one pair of parallel sides. The parallel sides are called bases of the trapezoid. Therefore, there can only be 2 bases.
Does a parallelogram have four right angles?
Not necessarily. A parallelogram is a quadrilateral with 2 sets of 2 parallel sides. Only rectangles and squares have right angles as all four angles - a rectangle is a "special" parallelogram that has all four angles equal; a square is a "special" rectangle that has all four sides of equal length.
What shape is a pentagon with only one pair of parallel sides?
a house shape: a floor, 2 parallel walls and an angled roof
What two dimensional figure has opposite side parallel and four right angles but not four equal sides?
The shape can only be a rectangle! A rectangle is a four-sided 2-dimentional figure, where every angle is a right angle, opposite sides are parallel, but the 4 sides are NOT equal.
