By definition, the number
is the ratio between the circumference and the diameter:

This implies that

And so your circumference is 
Calculate the mean of this data set: 12, 35, 44, 74, 23, 49, 45, 18, 90, 56, 84,
Blababa [14]
Well, here is the mean of ur data collected 48.181818...
Answer:
Corresponding angles
Step-by-step explanation:
In elementary geometry the word congruent is often used as follows.
Two line segments are congruent if they have the same length.
Two angles are congruent if they have the same measure.
Two circles are congruent if they have the same diameter.
The eight angles that are produced as a result of two parallel lines are cut by a transversal will together form four pairs of corresponding angles. Corresponding angles are congruent. All angles that have the same position with regards to the parallel lines and the transversal are corresponding pairs.
Answer:
Abraham Lincoln
Step-by-step explanation:
hes the 16th president, duh