Omar found a leg bone at (4, 12). Graph this point on the coordinate grid and label it L. Explain how you located the point by using the terms origin, x-coordinate, x-axis, y-coordinate, and y-axis.

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given