Abc is and isosceles triangle right angled at c. prove that absquare =2acsquare

See below.

Step-by-step explanation:

AB is the hypotenuse because it is opposite the right angle C.

By the  Pythagoras Theorem:

AB^2 = BC^2 +AC^2

But BC = AC because the triangle is isosceles, therefore:

AB^2 = 2AC^2.

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answer: its the third option.

step-by-step explanation:

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