Assertion: octagon's area | /r/HasProperty | calculated
Facets:
Source sentences:
text: Area of the octagon is calculated by summing up the areas of the 8 triangles, or, 8 x Area of one triangle (OAB).
text: The Area of the octagon is calculated by first finding the area of one of the Isosceles Triangles created by one side of the octagon, and two lines constructed from the center point to each vertex.