Understanding the Area Formula
Look at the drawing of a triangle within a rectangle,
The triangle and the rectangle have the same base, b,
and height, h
If the area of the triangle is 48 square units, what is the
total area of sections 1 and 2?
square units
Done
Intro

1. statement- ca is parallel to db and e is the midpoint of ad reason- given2. statement- reason- alternate interior angles3. statement- de is congruent to ae reason- definition of midpoint4. statement- triangle aec is congruent to triangle deb reason- asa (angle side angle)

Not only are the four sides congruent but all angles need to be 90° otherwise it could be a parallelogram or something