How to solve for x on a quadratic function

what is B) also.............

A formula that can be used to determine the measure of angle 1 include the following: D. 1/2(a° – b°).

What is the theorem of intersecting secants?

In Mathematics and Euclidean Geometry, the theorem of intersecting secants states that when two (2) lines intersect outside a circle, the measure of the angle formed by these lines is equal to one-half (½) of the difference of the two (2) arcs it intercepts.

By applying the theorem of intersecting secants to the circle, we can reasonably and logically deduce that the measure of angle 1 or m∠1 can be calculated as follows:

m∠1 = 1/2(a° – b°)

m∠1 = (a° – b°)/2

Read more on intersecting secants here: brainly.com/question/31049910

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Missing information:

The question is incomplete and the missing circle is shown in the attached picture.

Answer:

Hello the answer to your question is,

D. One-half(a° – b°)  

or

D. 1/2 (a° – b°)  

Step-by-step explanation:

I hope this helps.

And also trust me, I got it RIGHT. ( I putted them two answers bc for those people who have trouble writing/reading it down as word form and number form)