Worked examples
Two examples
Example 1
What is the midpoint of the segment from (2, 3) to (8, 7)?
- Average the x-values: (2 + 8) ÷ 2 = 5.
- Average the y-values: (3 + 7) ÷ 2 = 5.
Answer: (5, 5)
Example 2
What is the midpoint of the segment from (−4, 1) to (2, −5)?
- x: (−4 + 2) ÷ 2 = −1.
- y: (1 + (−5)) ÷ 2 = −2.
Answer: (−1, −2)
Where this is taught: The Coordinate Plane, “The midpoint”
The drill
Ten problems
This drill also has challenge problems. They use the same skill, set up the way the GED test sometimes sets up a problem, so that it looks new at first.
How many:
Type each answer as a point, like (3, -2). Then press Check my answers at the bottom.Write each answer as a point, like (3, −2). The answer key, with the reasoning, is on the last page.