Skip to content

Area and Perimeter

September 14, 2017

We made lots of different quadrilaterals with toothpicks today.  

We also looked at making right angle triangles (verified by using the Pythagorean theorem).


The challenge of today was to make a rectangle with the perimeter of 12 toothpicks.  There were a few different answers!

We predicted whether the area would be the same since the perimeter was the same, and then calculated to prove that the areas are all different.  The more square shaped (the closer the value of length and width) the more area the shape held.

The next challenge was to choose one of the original rectangles with perimeter 12, and try to reduce the perimeter while increasing the area.  We also tried to increase the perimeter and reduce the area.  

The top rectangle has a smaller perimeter and a bigger area than the rectangle with perimeter of 12 shown below it.

No comments yet

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: