Yes, you may think of "closed figure" as part of the definition of a quadrilateral.
Yes quadrilaterals are 4 sided closed figures or polygons
They are both closed figures
They are closed plane figures bounded by straight lines.
All four-sided figures are quadrilaterals.
quadrilaterals
Yes. Quadrilaterals means a closed shape with four sides, and a trapezoid has four sides, and is a closed shape.
There are none to be seen but if you meant 4 sided figures then they are quadrilaterals
yes polygons are closed figures
All 4 sided polygons are quadrilaterals such as a square, rectangle, parallelogram, rhombus, kite ... etc
Yes they are. The definition of a quadrilateral is a closed figure with four sides. A square always has four congruent sides and is a closed figure. Therefore, all squares are quadrilaterals. Trapezoids, rhombuses, and rectangles are also quadrilaterals.
because they have four sides, which is the definition of quadrilateral
Quadrilaterals are 4 sided shapes such as a square, a rectangle, a rhombus, a parallelogram, a kite ... etc