Worked examples
Two examples
Example 1
What is the distance between (1, 2) and (4, 6)?
- Across: 3. Up: 4. These are the legs of a right triangle.
- 32 + 42 = 9 + 16 = 25, and √25 = 5.
Answer: 5 units
Example 2
What is the distance between (−2, 1) and (10, 6)?
- Across: 12. Up: 5.
- 144 + 25 = 169, and √169 = 13.
Answer: 13 units
Where this is taught: The Coordinate Plane, “Distance when points are not lined up”
The drill
Ten problems
How many:
Type the number only; the unit is already there. Then press Check my answers at the bottom.Write each answer on the line. The answer key, with the reasoning, is on the last page.