Question

1. practice: organizing information and summarizing fill in the blanks to complete the list. midpoint of horizontal segment - coordinate = average of - coordinates of endpoints - coordinate = - coordinates of endpoints

Explanation:

Step1: Recall mid - point formula

For a horizontal segment, the y - coordinate of the mid - point is the same as the y - coordinates of the endpoints (since it's horizontal). The x - coordinate of the mid - point is the average of the x - coordinates of the endpoints.
So, the first blank is "x", the second blank is "x", and the third blank is "y".

Answer:

x; x; y