The distance between 𝑥1 and 𝑥2 is computed by (line-length x2 x1). The distance between 𝑦2 and 𝑦1 is computed by (line-length y2 y1). Below is the equation to compute the hypotenuse of a right triangle with legs the lengths of those distances:
√
Suppose your player is at (0, 2) and a character is at (4, 5). What is the distance between them?
1. Identify the values of 𝑥1, 𝑦1, 𝑥2, and 𝑦2
| 𝑥1 | 𝑦1 | 𝑥2 | 𝑦2 |
|---|---|---|---|
(x-value of 1st point) |
(y-value of 1st point) |
(x-value of 2nd point) |
(y-value of 2nd point) |
|
The equation to compute the distance between these points is:
√
2. Translate the expression above, for (0,2) and (4,5) into a Circle of Evaluation below.
Hint: In our programming language sqr is used for 𝑥2 and sqrt is used for √
3. Convert the Circle of Evaluation to Code below.
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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