Lines CD and DE are tangent to circle A, as shown below: Lines CD and DE are tangent to circle A and intersect at point D. Arc CE measures 110 degrees. Point B lies on circle A. If arc CE is 110°, what is the measure of ∠CDE?

55°
70°
100°
125°

70 degress

Step-by-step explanation:

The specific theorem is that if an angle is formed by two tangents outside of the circle, then the measure of that angle is equal to the difference of the intercepted arcs (major arc and minor arc)

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)