Take a look at the right triangle. The vertical leg has length 12 cm because the square is 12 cm on a side.
According to the Pyth. Thm., x^2 + (12 cm)^2 = (20 cm)^2. Then:
x^2 = 400 cm^2 - 144 cm^2, or x^2 = 56
Then the unknown side length, x, is +√56 = +7√8 = +14√2.
Answer:
the answer is 2/7
Step-by-step explanation:
4 2
__ - __ = 2
7 7 __
7
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