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The answer depends on what you are actually asking. If you mean 54 ft x the length of 10 legs + the length of 20 arms, then you can express it as "54 ft x (the length of 10 legs + the length of 20 arms)". If you know the actual length of each leg & each arm, then you could add the lengths of each leg & the lengths of each arm & and you could maken an expression such as: "54 ft x (TL leg ft + TL arm ft) If you know the average leg length & average arm length, then you could maken an expression such as: "54 ft x (10 x aver leg len + 20 x aver arm len) Lastly, if you know such lengths, you could multiple 54 x TL length of the appendage to arrive at total square feet number.
200 arms and 200 heads
no
The Pythagorean theorem defines a right triangle's measurements as A^2 + B^2 = C^2, and since an isosceles right triangle with two arms the same length the formula can be reworked as 2A^2 = C^2. We know that C is 18, so it becomes a matter of simple algebra to solve for A, the length of each arm of the triangle. I'll go through the math below: 2A^2 = 18^2 A^2 = 324/2 A = the square root of 162 A = approximately 12.7279
That's what they say anyways, I know mine is not. I'm 72" tall with a fingertip to fingertip measurement of 76" makes it extremely difficult to find a shirt with long enough arms that doesn't look like I'm wearing a tent on my body, if it fits good on by body it only reaches half way down my forearm... upside, I can reach your chin and you cant reach mine ha ha Good Luck!