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INVESTIGATING PROPERTIES OF QUADRILATERALS. Diagonals of a parallelogram. bisect each other. If the midpoints of adjacent sides of any quadrilateral are joined,. A parallelogram is formed. The line segment joining the midpoints of a trapezoid.
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Diagonals of a parallelogram bisect each other
If the midpoints of adjacent sides of any quadrilateral are joined, • A parallelogram is formed
The line segment joining the midpoints of a trapezoid • Is parallel to the parallel sides AB and DC • Is equal in length to the mean(average) of the lengths of the parallel sides • PQ = (AB + DC) / 2
If the diagonals of a quadrilateral bisect each other at right angles • The quadrilateral must be a rhombus • RECALL: • A rhombus is a quadrilateral with all four sides equal in length
The shape formed by joining the midpoints of a rhombus is • a rectangle