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SOLVING PROBLEMS INVOLVING
PARALLELOGRAMS, TRAPEZOIDS
AND KITES
In the previous lessons, we have learned about these
three types of quadrilaterals: the parallelogram, the
trapezoid, and the kite. We have also learned about
each of their properties. It is important that you, as a
student on geometry, remember these properties
since they are useful in solving problems on
geometry.
Parallelogram
• A parallelogram is a quadrilateral in which both pairs of
opposite sides are parallel.
• The properties of a parallelogram are:
• The opposite sides are congruent.
• The opposite angles are congruent.
• The non-opposite angles are supplementary angles.
• The diagonals bisect each other.
• Each diagonal divides a parallelogram into two congruent
triangles.
Trapezoid
• A trapezoid is a quadrilateral with exactly one pair of
parallel sides, while an isosceles trapezoid is a
trapezoid with congruent non-parallel sides.
• The median of a trapezoid is equal to half the sum of the
lengths of the two bases.
• The properties of an isosceles trapezoid are:
• The base angles are congruent.
• The diagonals are congruent.
Kite
• A kite is a quadrilateral with two distinct pairs of adjacent
sides that are congruent.
• The properties of a kite are:
• The non-vertex angles are congruent.
• The segment connecting the two vertex angles bisects the
two vertex angles.
• The diagonals are perpendicular.
• The segment connecting the two vertex angles bisects the
segment connecting the two non-vertex angles.

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Solving problems involving parallelograms, trapezoids and kites

  • 1. SOLVING PROBLEMS INVOLVING PARALLELOGRAMS, TRAPEZOIDS AND KITES In the previous lessons, we have learned about these three types of quadrilaterals: the parallelogram, the trapezoid, and the kite. We have also learned about each of their properties. It is important that you, as a student on geometry, remember these properties since they are useful in solving problems on geometry.
  • 2. Parallelogram • A parallelogram is a quadrilateral in which both pairs of opposite sides are parallel. • The properties of a parallelogram are: • The opposite sides are congruent. • The opposite angles are congruent. • The non-opposite angles are supplementary angles. • The diagonals bisect each other. • Each diagonal divides a parallelogram into two congruent triangles.
  • 3. Trapezoid • A trapezoid is a quadrilateral with exactly one pair of parallel sides, while an isosceles trapezoid is a trapezoid with congruent non-parallel sides. • The median of a trapezoid is equal to half the sum of the lengths of the two bases. • The properties of an isosceles trapezoid are: • The base angles are congruent. • The diagonals are congruent.
  • 4. Kite • A kite is a quadrilateral with two distinct pairs of adjacent sides that are congruent. • The properties of a kite are: • The non-vertex angles are congruent. • The segment connecting the two vertex angles bisects the two vertex angles. • The diagonals are perpendicular. • The segment connecting the two vertex angles bisects the segment connecting the two non-vertex angles.