Parallel lines
ef and cd
perpendicular lines
gh and ef
neither parallel nor
perpendicular lines
ab and cd

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.

6 equilateral triangles

what am i trying to find out. you didn't put up the whole question.

step-by-step explanation:

what is the question