standard_description: Prove theorems about parallelograms. Theorems include: opposite sides are congruent, opposite angles are congruent, the diagonals of a parallelogram bisect each other, and conversely, rectangles are parallelograms with congruent diagonals.
problem_activity: Problem 1
Write 500,000 + 20,000 + 6,000 + 100 + 4 in standard and word form.
Problem 2
Write three hundred forty thousand, seventy-eight in standard and expanded form.
Problem 3
Write 73,906 in word and expanded form.


aligns: no