Click on the boxes to show various measurements within the isosceles trapezoid.
Change the size of the isosceles trapezoid by clicking and dragging point B and C.
Make conjectures about the properties of a isosceles trapezoid.

For each of the questions below that you can answer yes to regardless of where you place point B or C, write a check mark in that box on your summary chart under isosceles trapezoid.
Is there exactly 1 pair of parallel sides?
Are there 2 pairs of parallel sides?
Is there exactly 1 pair of congruent sides?
Are there 2 pairs of congruent sides?
Are all 4 sides congruent to each other?
Are the diagonals perpendicular?
Are the diagonals congruent?
Do the diagonals bisect the angles?
Do the diagonals bisect each other?
Is there exactly 1 pair of opposite angles congruent?
Are 2 pairs of opposite congruent angles?
Are all the angles congruent?
Are the base angles congruent?