Please help for 50 points

A

Step-by-step explanation:

The exterior angle is equal to the sum of the opposite interior angles.

Call the inside angle D

A+ B + D = 180   sum of the angles of a triangle is 180

C+D = 180 since the form a straight line

Solving for D

D = 180-C

Substitute this into the first equation

A+ B + 180-C = 180

Subtract 180 from each side

A+ B + -C =0

Add C to each side

A + B = C

This proves the theorem

A

Step-by-step explanation:

An exterior angle = sum of other two interior angles (at other vertices)

step-by-step explanation:

it's is b

a

step-by-step explanation:

when a number is between two straight lines it means the absolute value.

to find absolute value you need to know how many numbers is that number away from 0.

when finding absolute value the number will always come out positive

so absolute value of -3 is 3

absolute value of 3/2 is 3/2

absolute value of -2 is 2

absolute value of 3.5 is 3.5

absolute value of -1 is 1

now put these numbers in order:

a)   |-1|, |3/2|, |-2|, |-3|, |3.5|