Britton rotated trapezoid ABCD 180 degrees on the coordinate pleane. If angle B is 20 degrees and angle D is 90 degrees, what is the degree measurement of angle B'?

Given:

Trapezoid ABCD rotated 180 degrees to get the trapezoid A'B'C'D'.

To find:

The measure of angle B'.

Solution:

We know that, rotation is a rigid transformation. It means the size and shape of the figure remains same after rotation or be can say that image and preimage are congruent.

So, .

                 (CPCTC)

Therefore, the measure of angle B' is 20 degrees.

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answer

see attachment

explanation

the given function is

this function has y-intercept at

-4 and a slope of 2.

note that, the graph has a positive slope.

the graph that represents this function is the straight line that moves upward from left to right.

the graph touches the y-axis at -4.

the correct choice is the graph shown in the attachment.