If a right triangle is inscribed in a circle then its hypote

If a right triangle is inscribed in a circle, then its hypotenuse is a diameter of the circle. In the figure below the blue dot is the centre of the circle. Find the area of the red right triangle with sides of length a, b, and c inscribed in a unit circle when the angle at vertex A is 63degree. (Round your answer to five decimal places.)

Solution

Solution: Area of the right triangle = 1/2 (a)(b).         Ans

...Note: In this question some thing is missing. Either radius or any other quantity is needed.