Does anyone know how to solve this?

x = - 6

Step-by-step explanation:

Parallel lines have equal slopes

Calculate the slopes of EF and CD and equate them

Calculate slopes using the slope formula

m =

with (x₁, y₁ ) = E (- 6, 14 ) and F (- 2, 4 )

= = = = -

Repeat with (x₁, y₁ ) = C (x, 16 ) and (x₂, y₂ ) = D (2, - 4 )

= =

Equate the 2 slopes and solve for x

= ( cross- multiply )

5(2 - x) = 40 ( divide both sides by 5 )

2 - x = 8 ( subtract 2 from both sides )

- x = 6 ( multiply both sides by - 1 )

x = - 6

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).