Vertex (4) - A, B, C, D

Angles (4) - angle a, angle b, angle c, angle d

Diagonals - AC, BD

Adjacent Angles - AB and BC, CD and DA, BC and CD, DA and AB

• All sides are equal.

• All angles are right angles (90°).

• Diagonals are equal in length.

• Diagonals bisect each other at right angles.

• Both pairs of opposite sides are parallel.

2. Rectangle

• Opposite sides are equal and parallel.

• All angles are right angles.

• Diagonals are equal in length.

• Diagonals bisect each other (but not necessarily at right angles).

3. Rhombus

• All sides are equal.

• Opposite angles are equal.

• Diagonals bisect each other at right angles.

• Diagonals are not equal (unless it’s a square).

• Opposite sides are parallel.

4. Parallelogram

• Opposite sides are equal and parallel.

• Opposite angles are equal.

• Diagonals bisect each other.

• Adjacent angles are supplementary (add to 180°).

5. Trapezium (Trapezoid)

• Only one pair of opposite sides is parallel.

• Non-parallel sides are called legs.

• Parallel sides are called bases.

• Angles on the same side of a leg are supplementary.

6. Kite

• Two pairs of adjacent sides are equal.

• One pair of opposite angles is equal.

• Diagonals intersect at right angles.

• One diagonal is the axis of symmetry.

• Longer diagonal bisects the shorter diagonal.