Question

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Answer 1

Step-by-step explanation:

3x+6x+81=180^

9x+81=180

9x=180-81

9x=99

x=11

3x=3×11=33

6x=6×11=66

Answer 2

Step-by-step explanation:

6 X + 3 X + 81 ° = 180 (the sum of all angles of a triangle is equals to 180 °)

9 X +81 ° = 180°

9X=180-81

9X = 99°

X = 99/9

X= 11 °

first angle equals to 6 into 11 equals to 60 degree

second angle is equals to 3 into 11 equals to 30 degree

third angle equals to 81 degree