The parallelogram is reflected across the line y = x. which of the following are coordinates of a vertex of the image?
a'(1, -5)
b'(-3,-4)
c'(-1,-2)
d'(1,3)

the answer to this is a. a^2 + b^2 = c^2

we know that

1) the inscribed angle measures half of the arc it comprises.

so

m∠dgf= > expression

2) the opposite angles in an inscribed quadrilateral are supplementary angles

so

m∠dgf=

m∠dgf=°

substitute in the expression to find the value of arc ef

therefore

the answer is

the measure of the arc ef is