Test 4 Section 3 - #14 (page 584)

Since you have a figure and it IS drawn to scale (because it doesn't say "Not drawn to scale"), you can use GUESSTIMATE here. Take a scrap piece of paper to measure the two sides of the shape that aren't labeled and compare them to the sides labeled 6. You'll see they're exactly the same, so all of the sides are 6, so the perimeter must be 30. When you're stuck on a Geometry question, think GUESSTIMATE!