A circle whose center is at origin passess through point [গণিত] . The length of the radious of this circle is?
ক. 6
খ. 7
গ. 5
ঘ. 8
উত্তর: 5
ব্যাখ্যা: Suppose C represents the pints [গণিত] . Let [গণিত] and [গণিত] denote the points [গণিত] and [গণিত] 1) respectively. Using the distance formula [গণিত] we get [গণিত] Hence, the points [গণিত] are on the circle with centre at [গণিত] and its radius is 5 units.
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