ZACH: Uh-oh, I think there’s something wrong with our virtual city, Kayla. KAYLA: Oh man, that does not look good! ADA: Virus detected! Virus detected!Press my emergency button for instructions.A ...

Narrator: Okay. Draw a rectangle.Now, measure the perimeter. It’s the total length around a shape. But what if you couldn’t measure the sides? Then you’d have to use what information you do know to ...