Easy
Find the distance between the points A(-4, 8) and B(1, 20).
Explanation
Explanation
Using the distance formula, AB = √[(x₂-x₁)² + (y₂-y₁)²] = √[(5)² + (12)²] = √[25 + 144] = √169 = 13 units.
PRO TIP
Re-check your working by substituting the answer back into the original question.