Question 986979
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The perimeter of this right-angled triangle is 


{{{8}}} + {{{15}}} + {{{sqrt(8^2 + 15^2)}}} = {{{8}}} + {{{15}}} + {{{sqrt(64 + 225)}}} = {{{8}}} + {{{15}}} + {{{sqrt(289)}}} = {{{8}}} + {{{15}}} + {{{17}}} = 40 feet.