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frez [133]
2 years ago
15

What is the angle of angle A in degrees

Mathematics
2 answers:
Margaret [11]2 years ago
7 0
Answer:
120°

Step-by-step explanation:
Triangle ABC is an isosceles triangle, which means ∠C = ∠B.
And the total degrees of a triangles inner angles is 180°.
So to find ∠A all you do is 180° - (∠C + ∠B).
∠C + ∠B would be 30+30 which is 60°
And 180° - 60° is 120°.

Hope this helps!
-BARSIC- [3]2 years ago
3 0

\huge\fbox{Answer ☘}

From the figure , it is quite clear that the sides AB and AC have the same measure , i.e. , 8 units .

we know that ,

angles opposite to equal sides are equal.

therefore ,

∠B = ∠C = 30°

Now ,

angle sum property of a ∆ states that the sum of all the angles of a triangle equals 180°

thus ,

∠A + ∠B + ∠C = 180° \\  \\ ∠A + 30° + 30° = 180° \\  \\ ∠A + 60° = 180° \\  \\ ∠A = 180° - 60° \\  \\ ∠A = 120°

therefore ,

option ( c ) 120° is correct .

hope helpful ~

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