Please answer this questions I am not understand this question please answer me

This is the expression of quadrilateral.

Step-by-step explanation:

I think there is missing x or y

Because in geometry in quadrilater there should be 3 numbers and there should be x or y.

55 degrees because 55+55=110 degrees

arc length = 6.63311 ft.

step-by-step explanation:

the formula the arc measure is:

arc length s=2πr(c)/360

where:

c   is the central angle of the arc in degrees

r   is the radius of the arc

π   is pi, approximately 3.142

using the above formula we get

s =

thus we find that arc length of an arc for a circle of radius 20 feet and central angle 19 degrees is

6.63311 feet