Which set of side lengths can form a triangle? a. 6cm, 8cm, and 16cmb. 6cm, 8cm, and 10cmc. 6cm, 7cm, and 14cmd. 6cm, 7cm, and 20cm

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