Question

plz find the 3rd one​

Answer 1

your answer is here ✌

(a,b) and (-a,-b)

formula for distance between two points

= √{(x1 - x2)² + (y1-y2)²}

here x1 = a

x2 = -a

y1 = b

y2 = -b

so distance = √{(a+a)²+ (b+b)²}

= √{4a²+4b²}

= 2√{a²+b²}