What is the perimeter of the octagon? 11.2 cm 14.1 cm 15.2 cm 20.8 cm

Itook a better photo of the question so y’all can see it i hope it’s a fine photo

The standard distance between studs in a house is 1.5 feet. if you have a set of blueprints for a house that mark every 1.5 feet with 2 in., by how many inches will a 13-foot wall be represented?

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons