The slope of ef is -5/2 which segments are perpendicular to ef?

Any line with a slope (m) of 2/5

Step-by-step explanation:

It is easy to find the slope of a perpendicular line when one of the lines is given. All you have to do is flip the fraction (If it is a whole number, set under 1.), and change the sign (negative to positive, and vice versa).

In this case the perpendicular slope of (-5/2) is 2/5.

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c. 27 units.

step-by-step explanation:

we are told that in circle a, ∠bae ≅ ∠dae.

we can see from our given diagram that in and ;

, as these are radii of our given circle.

therefore, by sas congruence postulate.

hence, side be will be equal to side de as corresponding parts of congruent triangles are congruent. so we can set an equation to find the value of x as:

now let us substitute x=17 in the expression for the length of be.

therefore, length of be will be 27 units and option c is the correct choice.