Final answer:
The triangle formed in this scenario is an isosceles triangle because it has two sides of equal length. Hence the correct answer is option C
Step-by-step explanation:
The triangle formed in this scenario is an isosceles triangle.
An isosceles triangle has two sides of equal length and two equal angles opposite those sides. In this case, the diameter of the circle forms the base of the triangle, and the two sides of the triangle are the radii of the circle. Since the radii are equal in length, the triangle is isosceles.
Hence the correct answer is option C