The 3 properties of shapes that we are going to look at are # The number of sides # The interior angles (the angles inside). # The length of the sides. These properties help use to remember which shapes are which and why they so called (in some cases). Let us look at shapes that have 4 sides Quadrilaterals (Quad- means 4). Quadrilaterals ALWAYS have 4 sides The interior angles of a triangle add up to 360 degrees. Here are the quadrilaterals you are expected to know about. # Square # Rhombus # Rectangle # Parallelogram # Trapezium # Kite That does not seem to many does it. Let us look at the properties of quadrilaterals.
a square
a quadrilateral
Rectangle
A kite.
This is a quadrilateral. It could be a symmetric trapezium /
a square
A quadrilateral with 2 pairs of equal sides could be a parallelogram, a trapezoid, a kite, or a rectangle. If all 4 sides are equal, then it could also be a rhombus or a square.
a quadrilateral
rectangle
Rectangle
yes
rectangle
A kite has two pairs of equal sides with no parallel sides.
A parallelogram
A parallelogram is such a shape.
rectangle
That's not possible. No rhombus (quadrilateral with two pairs of equal sides) cannot be a parallelogram.