MCQ
If $A(-6,7)$ and $B(-1,-5)$ are two given points then the distance $2 \ AB$ is
- A$13$
- ✓$26$
- C$169$
- D$238$
✓
Answer
Correct option: B.
$26$
$2 \ AB =2 \times \sqrt{(-1+6)^2+(-5-7)^2}$
$=2 \times \sqrt{5^2+(-12)^2}$
$=2 \times \sqrt{169}$
$=2 \times 13$
$=26$
$=2 \times \sqrt{5^2+(-12)^2}$
$=2 \times \sqrt{169}$
$=2 \times 13$
$=26$
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