Physics ~ Lee K. Jones © Dallas School District 2 (9/2013) () -  ()

Mensuration I:

These are "bottom rung" tasks for students. Mensuration can be widely and meaningfully expanded. This leads to volumes, formula writing, summations, combinations and permutations.

Each figure is plane. In each case use geometry with the notations given to determine an equation for the perimeter and the area of the figure.


1) Square:

a) Perimeter:

b) Area:

2) Triangle:

a) Perimeter:

b) Area:


3) Triangle:

a) Perimeter:

b) Area:

5) We start with an area of area "L x L." We cut that area in half vertically, discarding the left half. We cut the remaining area in half, horizontally. Discard the top, cut in half, discard the left... After we cut SIX times, what area remains?