figure 5 : door decoration
This image has a scale of 0.25:1. I took this image in the "hacienda La Collpa" as a decoration of one door. It is an irregular octagon.
Side 1 : 32 cm.
Side 2 : 16 cm.
Side 3 : 12 cm.
Perimeter : 152 cm.
Area: 1071 square cm.
Apothem: 14 cm.
Formula:
Perimeter : 2(s1)+4(s2)+2(s3)
Area : (perimeter x apothem) / 2