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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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Step-by-step explanation:

The complete exercise is: "The circumference of a circle is 47.1 and the diameter of the circle is 15. Which best represents the value of π? "

In order to solve this exercise, it is important to remember that the circle can be calculated with the following formulas:

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2. C=2\pi r

Where "C"  is the circumference of the circle and "r" is the radius of the circle (Remeber that the diameter is twice the radius).

In this case, the exercise gives you the circumference of the circle and its diameter. These are:

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