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The point you've described, (2squared over 2, 2squared over 2), seems to be trying to represent the point (√2/2, √2/2). This point on the unit circle corresponds to an angle of 45 degrees (or π/4 radians) from the positive x-axis because the x and y coordinates are equal, which means the triangle formed by the origin, this point, and the point where the perpendicular from this point intersects the x-axis creates an isosceles right triangle.
The angles in an isosceles right triangle are 45 degrees, 45 degrees, and 90 degrees. Therefore, the correct answer is:
b) a 45-45-90 triangle