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oldcoolschool
hmm ok soo if u know that all angles have degrees sooo if ur looking at c with a 60° angle ,proof:angle protractor.............hope this helps :)

Answer: C. 60°

Step-by-step explanation:

Since, the sum of all angles of a triangle is 180°,

Thus, by the given diagram,

[tex]m\angleA + m\angle B + m\angle C = 180^{\circ}[/tex]

⇒ [tex]4x + 2x + 3x = 180^{\circ}[/tex]

⇒ [tex]9x = 180^{\circ}[/tex]

⇒ [tex]x = 20^{\circ}[/tex]

Hence, the measurement of angle C = 3x = 3 × 20° = 60°

⇒ Option C is correct.

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