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Andreyy89
3 years ago
10

What is the value of n

Mathematics
2 answers:
Vladimir79 [104]3 years ago
8 0
<h2>Answer:</h2>

<u>The correct option is</u><u> (D) 69</u>

<h2>Step-by-step explanation:</h2>

n = (interior angle of 131°  + interior angle of 160°)

From the figure we can see that

The interior angle of angle 131° = 180 - 131 = 49° because the sun of the two angles must be 180 for a straight line

Similarly

The interior angle of angle 160° = 180 - 160 = 20°  because the sun of the two angles must be 180 for a straight line

Now the sum of interior angles of a triangles is 180 so n =  49° + 20° =  69°

Crank3 years ago
7 0

Answer:

The correct answer is option D. 69°

Step-by-step explanation:

Points to remember

1). The sum of angles in a linear pair is 180°

2). In a triangle sum of two angles are equal to the exterior angle of third angle

From the figure we can see a triangle in which two exterior angles area given.

<u>To find the value of n</u>

from figure we get,

n = (interior angle of 131°  + interior angle of 160°)

interior angle of 131° = 180 - 131 = 49°

interior angle of 160° = 180 - 160 = 20°

n =  49° + 20° =  69°

Therefore the  correct answer is option D. 69°

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