Use δabc below to answer the question that follows:

which fact is not used to prove that abc is similar to dbe?

the sum of angles a and b are supplementary to angle c.

segments ac and de are parallel.

ab is a transversal line passing ac and de.

angle b is congruent to itself due to the reflexive property.

Two triangles can be similar by AAA,ASA ,SSS ,SAS property of similarity.

To prove triangles ABC  similar to DBE  we consider

Segments AC and DE are parallel.

AB is a transversal line passing AC and DE.

Angle B is congruent to itself due to the reflexive property.

The option which is not used to prove that ABC is similar to DBE is the first option :

The sum of angles A and B are supplementary to angle C.

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.