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1 answer:
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First we have to find length of 1 side of the square. We can use formula for area of the square. A=a*a ==> 
where a is length of the side.
From this formula we can find
a=
Now we just have to multiply it by 4, because there are 4 sides.
81*4=324 - its the answer
From this formula we can find
a=
Now we just have to multiply it by 4, because there are 4 sides.
81*4=324 - its the answer
Answer:
15 units
Step-by-step explanation:
ΔABC is right with ∠C = 90° and AB the hypotenuse
using Pythagoras' identity on the triangle
AB² = AC² + BC² , hence
BC² = AB² - AC² = 17² - 8² = 289 - 64 = 225
⇒BC = = 15 units