Question

find the distance between the following pairs of points (a, b) and (-a, -b) ​

Answer 1

$distance \: formula \: = \: \sqrt{ {(x1 - x2)}^{2} } + {(y1 - y2)}^{2}$

Given :

x1 = a

x2 = -a

y1 = b

y2 = -b

=> √[ a - (-a) ]² + [ b - (-b) ]

=> √ (a +a)² + (b + b)²

=> √ ( 2a)² + ( 2b)²

=> √ 4a² + 4b²

=> √ 4 (a² + b²)

= 2√ (a² + b²)

Hope it helps.

Answer 2

Answer:

use distance formula as shown in the pic.

(hope it helped you)