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Step-by-step explanation:
Question 9:
Hypotenuse = 7
Leg = Hypotenuse / √2 = 7/√2 = 7√2 / 2.
Therefore x = y = 7√2 / 2.
Question 10:
Leg = 10
Since x is also a Leg, x = 10.
Hypotenuse = Leg * √2 = 10√2. => y = 10√2.
Question 11:
Leg = 7
Since x is also a Leg, x = 7.
Hypotenuse = Leg * √2 = 7√2, => y = 7√2.