Question

4
Identify the angle of rotation that maps triangle BCD to
triangle B'C'D'.
What is the angle of rotation?
O 90°
2
C С
O 180°
X
O 270°
-2
P Р
2
4
B В
C
0 360°

Answer 1

Answer:

B on edge 2022

I got it right and the guy above me is right

Answer 2

Following the transformation of BCD to triangle B'C'D', only the signs of

the x and y values changes, the angle of rotation is therefore;

• 180°

How can the angle of rotation of tringle BCD be found?

The coordinate of the point C on the preimage = (-2, 1)

The coordinate of the point C' on the image = (2, -1)

The difference in the coordinate is the change in the sign of the x and y

values.

The coordinate of a point (x, y) following a 180° rotation about the origin

is the point (-x, -y).

• $(x, \, y) \ \underrightarrow {180^{\circ} \ rotation} \ (-x, -y)$

Therefore;

• The angle of rotation of the preimage, triangle BCD to triangle B'C'D', is 180°

Learn more about rigid (rotational) transformation here:

https://brainly.com/question/11068588