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Tatiana [17]
2 years ago
12

Can someone help me with this question? Thank you!

Mathematics
2 answers:
shepuryov [24]2 years ago
8 0

Answer:

20°

Step-by-step explanation:

A triangle = 180°

∴ 180° -120°-40°

=20°

pav-90 [236]2 years ago
4 0

Answer:

20°

Step-by-step explanation:

The Angle Sum Property of a triangle gives that the sum of the internal angles of a triangle is equal to 180°.

Hence,

⇒ ∠A + ∠B + ∠C = 180°

⇒ ∠A + <u>120°</u> + <u>40°</u> = 180°

⇒ ∠A + 160° = 180°

⇒ ∠A = 20°

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