Lattice polygons are polygons are formed by connecting dots on square dot paper. (On a coordinate graph, the coordinates of the vertices are integers.).
The lattice polygon below is a rectangle whose dimensions are 2 units by 4 units. Its area is 8 square units.
(1) Can you make a small change to the rectangle so that the area of the new polygon is 6 square units? There are lots of ways to do this.
(2) How many different kinds of polygons can you make on a geoboard with an area of exactly 6 square units? Can you make a triangle? a quadrilateral? a 5-sided figure? 6-sided? 7-sided? 8-sided?
It is convenient to use this online geoboard: Geoboard
For the solution, click below:
(1) There are lots of ways to change the figure to have an area of 6. Here are some:
(2) The figures above are 4 and 5-sided figures. You can make lots of different figures with almost any number of sides. Here is a 10-sided figure with an area of 6!
Post a Comment
Note: Only a member of this blog may post a comment.