Question

a polygon has the following coordinates A(1,-1), B(-4,-1), C(-4,3), D(1,3) find the length of BC.

Answer 1

Answer:

BC = 4

Step-by-step explanation:

sqrt( (-4-(-4))^2+(3-(-1))^2)

Answer 2

Answer:

4

Step-by-step explanation:

using points (-4,-1) and (-4,3) put them into the equation.

$\\\sqrt{(x_{2} -x_{1} )^{2} +(y_{2}-y_{1} )^{2} }$

$\sqrt{((-4)-(-4))^{2}+ 3-(-1))^{2} }$

$\sqrt{0+(3+1)^{2} }$

$\sqrt{0+16}$

$\sqrt{16}$

4