Question

find the value of unknown angle a,b,c from the following diagram​

Answer 1

Answer:

∠a = 50°

∠b = 70°

∠c = 60°

Step-by-step explanation:

∠a = 50° as the lines r parallel (alt. int. angles)

∠b = 70° as

• 60+∠a+ ∠b = 180°
• 60+ 50 +∠b = 180
• ∠b = 180 - 110 = 70°

∠c = 180 - (50+70)   { angle sum property}

∠c = 180-120= 60°