Question

How can you write an expression using variables `B` and `C` to find the perimeter of the quad. The quadrangle has the following lengths: `B`, `C`, `B-2`, `C-B`. Step 2 if `B=11` and `C=16` what is the perimeter?

Answer 1

The perimeter is simply the sum of the lengths of the sides, so `B+C+B−2+C−B`. We can collect like terms to get `B+2C-2`. Substituting in `B=11` and `C=16` gives `11+32-2=41` units.