What are the common factors of 16a and 20ab

Trapezoid abcd is an isosceles trapezoid, ad||cb, a diagonal line runs from angle d to b. angle cdb is 50 degrees and angle dab is 70 degrees, find the remaining angle degrees for angles bda, dba, bcd, and dcb.

Acomposition of transformations maps δxyz to δx"y"z". the first transformation for this composition is , and the second transformation is a 90° rotation about point x'.

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)