which equation shows the associative property of addition?3+(2+1)=2+(2+2)4+(6+7)=(4+ 6)+79+(1+5)=(7+8)+08+(2+4)=7+(5+2)

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte