When the measured value equals the actual value, we have a perfect measurement with zero error. Let's verify: If Measured = Actual, then Absolute Error = |Measured - Actual| = |Actual - Actual| = |0| = 0. Relative Error = \(\frac{\text{Absolute Error}}{\text{Actual Value}}\) = \(\frac{0}{\text{Actual}}\) = 0. Percentage Error = Relative Error × 100% = 0 × 100% = 0%. A percentage error of 0% represents a theoretically perfect measurement with no error whatsoever. In practice, this rarely happens in real experiments due to limitations of measuring instruments and human error. In ECZ exams, zero percentage error might appear in idealized questions or when testing your understanding of the formulas. Remember: 0% error means perfect accuracy, while 100% error means the error is as large as the quantity being measured (very poor accuracy).

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Zambia

• ivwananji siwale – 29 pts

• Mid-point of A Line
• Equation of a Straight Line
• Parallel and Perpendicular Lines
• Area of Rectilinear Figures
• Distance of A Straight Line