Final answer:
To find the matching slopes and lengths after a dilation, multiply the lengths by the scale factor and keep the slopes the same.
Step-by-step explanation:
To identify the matching slopes and lengths of the sides for polygon ABCD after a dilation with a scale factor of 1.2, we need to multiply the lengths by 1.2 and keep the slopes the same.
a) Angle aB: The length remains 5 units and the slope remains 5.
b) Side BC: The length becomes 4 * 1.2 = 4.8 units and the slope remains 0.25.
c) Side CD: The length becomes 4.5 * 1.2 = 5.4 units and the slope remains -2.
d) Side AD: The length becomes 7 * 1.2 = 8.4 units and the slope remains 20.