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Dima020 [189]
3 years ago
15

(9x – 9) (3x + 9)°/B Find the measure of ABC

Mathematics
1 answer:
katrin2010 [14]3 years ago
5 0

Answer:

<ABC = 54 degrees

Step-by-step explanation:

Taking the sum of angle on the straight line ABD as 180 degrees

3x+9 + 9x - 9 =180

12x = 180

x = 180/12

x =  15 degrees

Since <ABC = 3x+9 (vertically opposite angles)

<ABC = 3(15)+9

<ABC = 45+9

<ABC = 54 degrees

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