If r is the radius of a circle and d is its diameter which of the following is an equivalent formula for the circumference c = 2 pie r a C = pie d2
b C = pie rd
c C = pie d
d C = 2 pie d

C

Step-by-step explanation:

C=2pier or pied

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.