Find the value of z, secant and tangent angles

Step-by-step explanation:

One is given a circle with two secants. Please note that a secant is a line that intersects a circle in two places. The secant exterior angle theorem states that when two secants intersect each other outside of a circle, the measure of the angle formed is half the of the positive difference of the intersecting arcs. One can apply this theorem here by stating the following:

Simplify,

Inverse operations,

Substitute this value into the equation for one of the intersecting arcs to find the numerical value of that intersecting arc:

The sum of all arc measures in a circle is (360) degrees. One can apply this here by stating the following:

Simplify,

Inverse operations,

5/6

step-by-step explanation:

if i remember correctly with perpendicular stuff you just take away the negative