Question

Tell whether the angles are complementary or supplementary. Then find the value of x.

Answer 1

Answer:

supplementary, 19

Step-by-step explanation:

Since both angles measures add up to 180°, therefore they’re called supplementary angles.

To find the value of x, add the two angle measures

123° + 3x° = 180°

reverse the sum

3x° + 123° = 180°

Subtract 123° from both sides

(3x° + 123° - 123° = 180° - 123°)

3x° = 57°

Solve for x

x = 57°/3°

x = 19

Answer 2

Answer:

$3x + 123 = 180 \\ \\ 3x = 180 - 123 \\ \\ 3x = 59 \\ \\ x = \frac{59}{3} \\ \\ x = 19.66$

it's is a straight angle or supplement angel Also they sum are 180 degree

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