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

Answer 1

Since angles 7 and 8 are supplementary (meaning they add up to 180 degrees), you can write the equation: m∠7 + m∠8 = 180°.

By substituting in the given value, this equation becomes: m∠7 + 45° = 180°.