Form a right triangle: Imagine a right triangle where AB is the hypotenuse. Draw a vertical line down from B and a horizontal line right from A to create the legs of the triangle.
Find the length of the legs: Count the grid squares to find the length of each leg. One leg is 3 units long, and the other is 4 units long.
Apply the Pythagorean Theorem: The Pythagorean Theorem states: a² + b² = c² where a and b are the lengths of the legs, and c is the length of the hypotenuse.
Substitute the values: 3² + 4² = c²
Calculate: 9 + 16 = c²
Simplify: 25 = c²
Solve for c: c = √25 = 5
Therefore, the distance between points A and B is 5 units.
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