Today’s lesson focused on calculating the area of parallelograms. Our classroom discussion centered around determining which side of the parallelogram is the base. This was my instruction to students:

“The base side is the side of the figure that the height line intersects and forms a right angle.”

I also reminded students that opposite sides are equal. Many of tonight’s problems only give measurements for two sides of the figure. I have taught my students to look to the opposite side of the figure if they are missing a measurement. Again, opposite sides are equal.

Please remember: calculate both area and perimeter for tonight’s homework.