tiffg3140
04.06.2020 •
Mathematics
An arched window has dimensions as shown at the right. Consider the top of the window to be a semicircle. How much plastic covering is needed to cover the window, following the outline of the window?
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Ответ:
a^2 + b^2 = c ^2
a = first leg
b = second leg
c = hypothenuse
225 + b^2 = 625
b^2 = 400 -> b = 20 meters