Annabelle used a protractor to measure the angle below. is annabelle using the protractor correctly? explain your answer. if annabelle is using it incorrectly, explain to her how to use it correctly.

You didn't give me an angle but here's how to us a protractor

Step-by-step explanation: To measure an acute angle (less than 90   degrees), put the vertex at  

the center of the straight side of the protractor, lining up one half  

of that side with one side of the angle, so that the other side is  

under the protractor. On the curved edge of the protractor are  

(usually) two sets of numbers; one scale starts with zero on the left  

edge and increases to the right, while the other starts with zero on  

the right edge and increases to the left. Choose the scale that starts  

on the side that you lined up with a side of the angle. Read off the  

number from this scale at the point where the other side of the angle  

crosses the protractor.

Annabelle is using it incorrectly

Step-by-step explanation:

Annabelle is using it incorrectly - see the missing pic below

to measure the angle below, one line should be aligned to the 0-deg/180-deg line, then read the angle made by the second line

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180