3.That BC are congruent and that AB and AC are congruent as well
There isn't a picture of a pattern to go by.
I think it is 78 I hope is help you :)
The property that is applied in
is addition property of equality
Given :

From the above equation we can see that 4 is added at the both sides of the equation .
we can add same number at the both sides of the equation to balance the equation . That is called as addition property of equality
Here , 4 is added on both sides of the equality to balance the equation .
So , addition property of equality is applied .
Learn more : brainly.com/question/24214650