What is the next term of the arithmetic sequence? -7,-5,-3,-1,1,−7,−5,−3,−1,1,minus, 7, comma, minus, 5, comma, minus, 3, comma, minus, 1, comma, 1, comma

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