Find the solution of the systems of equations

Use circumcenter theorem to solve for the given values

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.

Is a triangle with sides of length 6ft, 21 ft, 23 ft. a right triangle?