Answer:
step 3: he should have divided both sides by -7
Answer:DC=7
Step-by-step explanation:
As it is written △ABC = △DBC. So the corresonding legs (the legs which are equal ) are as follows:
AC=DC AB=DB BC= BC
So DC=7 the same like AC
Are you asking for the definition of circumference? because you didn’t attach a picture or give us an equation to do.