Respuesta :

apologiabiology
das is disguised pythagorean theorme

the height is one leg
the distance from house is other leg
length of ladder=hyptoonuse

so
remmeber
if legs of right triangle are a and b and hyptonuse is c then
a²+b²=c²

so
legs are 15 and 20
15²+20²=c²
225+400=c²
625=c²
sqrt both sides
25=c

25ft is length of laddder

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