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OpenStudy (anonymous):
In the figure, rectangle ABCD is rotated 270° counterclockwise around point D to form rectangle EFGD. The perimeter of rectangle ABCD is 30 cm. How long is segment EC? _____cm
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OpenStudy (anonymous):
OpenStudy (anonymous):
15 cm ? @jim_thompson5910
jimthompson5910 (jim_thompson5910):
EF = CD since they correspond to one another CD rotates to EF and they match up
jimthompson5910 (jim_thompson5910):
AB = CD because we have a rectangle with opposite congruent sides
jimthompson5910 (jim_thompson5910):
|dw:1427849438996:dw|
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jimthompson5910 (jim_thompson5910):
what is the perimeter of that rectangle above?
OpenStudy (anonymous):
lol I got my answer it was 15
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