Question

Find the missing angle

Answer 1

THEOREM:

• Angle sum property —: The sum of interior angles of a triangle is 180°.

ANSWER:

Let the missing angle be x.

By angle sum property,

• ∠x + 20° + 80° = 180°
• ∠x + 100 = 180°
• ∠x = 180° – 100°
• ∠x = 80°

So, Correct choice - [C] 80°.

Answer 2

Answer:

Answer:$\huge\mathfrak\pink{S} \huge\mathfrak\purple{o} \huge\mathfrak\blue{l} \huge\mathfrak\red{u} \huge\mathfrak\green{t} \huge\mathfrak\pink{i}\huge\mathfrak\purple{o}\huge\mathfrak\red{n}\huge\mathfrak\orange{➔}$

80°+20°+missing angle=180°[ sum of interior angle of a triangle is 180°]

missing angle=180°+100=80°

is your answer