Unit 7

Big Ideas!

  • Prove theorems about parallelograms, such as...
  1. opposite sides are congruent.
  2. opposite angles are congruent.
  3. Diagonals bisect each other.
  • prove theorems about quadrilaterals, such as...
  1. rectangles are parallelograms with congruent diagonals.
  • prove or disprove that a figure defined by four given points in the coordinate plane is a special quadrilateral, such as a trapezoid, rectangle, rhombus, square, kite, or parallelogram.
  • Use coordinates to compute areas and perimeters of rectangles.


Remember that just because something has 2 pairs of parallel sides doesn't make it a rectangle. It is a parallelogram for sure.

What I struggled with!

I struggled with remembering that squares are always rectangles are not always squares.