Carter speaks with Peter about a stunt he pulled involving music. He tells Peter that music is forbidden in prison, and Peter calls him obtuse. Carter creates an obtuse angle using his body and creates an acute angle soon after to show that he isn't obtuse.

A captain has to navigate through shallow waters. She does so using math.

The Sad Man and the kids look at the different types of triangles.

Matt and Jackie have three differently-colored keys and knobs. They need to use one combination of key and knob to open the door. They organize all of the available combinations into a grid of possibilities and calculate that they have 9 total combinations. As they attempt each combination, they mark down which combination was used until they find the working one.

Why snowball sampling and censusing are used.