Question

Name the property of equality that justifies the statement
If m∠A+m∠B=m∠C then m∠A=m∠C-m∠B

Answer 1

@563blackghost

Answer 2

Since `A + B = C` then if we were to make an equation of `A` we would subtract `B` from both sides.....

\(\Large{\angle A + ( \angle B - \angle B) = \angle C - \angle B \rightarrow \color{red}{\angle A = \angle C - \angle B}}\)

This would mean that this is justified by the `Subtraction Property of Equality`

Properties of Equality:

http://www.mathplanet.com/education/algebra-1/how-to-solve-linear-equations/properties-of-equalities

Answer 3

Thank you

Answer 4

np :)