3 years ago

Answer 11-12 it’s ok if your don’t no one of them. Please do at least one. Thanks.

Mathematics

1 answer:

Naddika [18.5K]3 years ago

3 0

[11]

Equation: 180° - 75°

Measure: 105°

A straight line has an angle measurement of 180°. Since we have GFB, 75°, we can find EFB this way.

[12]

Equation: 90° - 40°

Measure: 50°

The little box in the angle shows that it is equal to 90°. Since they give us HGB, 40°, we can solve for EFB using this information.

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

katrin2010 [14]

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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