Which is not true about the upper paleolithic period? A. People made tools by chipping flint pebbles into blades and scrapers that had sharp edges.
B. Humans and animal forms begin to be seen in art
C. The period took place between 40,000 and 4,000 BCE
D. In cave art, Artists used the cave's irregularities to create images

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perimeter = 2l +2w, divide total perimeter by 2 for total length of 1 side and 1 width

172/2 = 86 (  total for 1 side and 1 width)

86-24 = 62 (since length is 24 ft longer subtract 24 then divide by 2 for width)

62/2 = 31

width = 31 feet

length = 31 +24 = 55 feet

check: 31*2 = 62, 55*2 = 110,  110+62 = 172

based on the images pictured above, the major difference between the two cathedrals: the cathedral of notre dame and the amiens cathedral, is that the cathedral of notre dame emphasizes the horizontal lines while the amiens cathedral emphasizes the vertical lines.