Write the equation of a circle with center at (0, 0) and a diameter of 20. a. x2 + y2 = 100 b. x2 + y2 = 20 c. x2 + y2 = 10 d. x2 - y2 = 400

Angle 1 - 26 degrees

Angle 2 - 49 degrees

Angle 3 - 105 degrees

Step-by-step explanation:

To answer this, make the equation 2x + (3x + 10) + (5x + 40) = 180. Combine common terms to get: 10x + 50 = 180. Subtract 50 from both sides to get: 10x = 130. Now divide 10 from both sides to get: x = 13.

Now that you have the information x = 13, use it to find the angle measures by inserting the value 13 into the expressions in place of x.

Angle A = 2x:

2x = 2(13) = 26

Angle B = 3x + 10:

3x + 10 = 3(13) + 10 = 39 + 10 = 49

Angle C = 5x + 40:

5x + 40 = 5(13) + 40 = 65 + 40 = 105

Check:

To check your answer, add 26 + 49 + 105. You get 180, so this is correct!

Note:

Hope it helps!