Which conjecture is possible to prove? O All pentagons with at least one side length of 5 are congruent.
All squares with at least one side length of 5 are congruent.
O All triangles with at least one side length of 5 are congruent.
O All rectangles with at least one side length of 5 are congruent.

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

i think da answer is

d.square root of 3