No, some of the geometrical answers are wrong.
Yes, all of the radii in a single circle are congruent.
All right triangles inscribed in a circle have their vertices on the circle and the hypotenuse as the circle's diameter. Thus the midpoint of the hypotenuse is the center of the circle nd all points on the circle are eqully as far from the center even so the vertex of the right angle.
Yes. It follows from one of the circle theorems which states that the angle subtended in a semicircle is a right angle.
In a circle no, in a square yes.
yes there is i will give you it press up down L1 R1 right left circle up down right circle circle left it will work
yes. the leg of the triangle has to be formed different because of the circle
Yes
Yes
Yes, providing that each radius is in the same circle
no. if it did it wouldent be a circle a circle can circumscribe a right angle a right angle whose vertex lies on a circle has sides that intersect the circle's diameter.
yes
yes.