If m∠8=45° , what equation can you write to find the value of m∠7 ?

Answer 1

The equation to find the value of m∠7 would be:

m∠7 + m∠8 + m∠9 = 180°

Since m∠8 is given as 45°, the equation becomes:

m∠7 + 45° + m∠9 = 180°