Question

If m<3=105, what is the m<21 that will prove that lines P and R are parallel. please help

Answer 1

Answer: 75°

have: m∠3 = m∠11 = m∠22 = 105°

but m∠22 + m∠21 = 180°

=> m∠21 = 180° - 105° = 75°

Explanation: