Question

francesca takes a 21-inch by 28-inch rectangle of plywood and uses a table saw to cut from one corner of the piece of plywood to the diagonally opposite corner. now francesca has two equally sized triangles of plywood. what is the perimeter of each triangle?
inches

Explanation:

Step1: Find diagonal length

Use Pythagorean theorem: $c = \sqrt{a^2 + b^2}$
$c = \sqrt{21^2 + 28^2} = \sqrt{441 + 784} = \sqrt{1225} = 35$

Step2: Calculate triangle perimeter

Sum sides: $21 + 28 + 35$

Answer:

84 inches