What is the radius of the circumference of 106.76

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

What is a possible solutions of the x> 3?

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area