2. Find the distance between points A (0,0) and B (-a, a).
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Distance formula :
d² = (x2-x1)²+(y2-y1)²
Therefore : d² = (-a-0)²+(a-0)²
= a ²-2a0+0 ² + a ²-2a0+ 0²
= a ²+ a²
d =√2a²
d² = (x2-x1)²+(y2-y1)²
Therefore : d² = (-a-0)²+(a-0)²
= a ²-2a0+0 ² + a ²-2a0+ 0²
= a ²+ a²
d =√2a²
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