Question

if point C has coordinates (4, 2) and point D has coordinates (8, 5), then what is the length of CD?

Answer 1

$Length = \sqrt{(Y_2-Y_1)^2 + (X_2-X_1)^2}$

$Point \ (4, 2) \ and \ (8, 5)$

$Length = \sqrt{(5-2)^2 + (8-4)^2}$

$Length = \sqrt{(3)^2 + (4)^2}$

$Length = \sqrt{9 + 16}$

$Length = \sqrt{25}$

$Length = 5$

$\ Answer \Longrightarrow \boxed {\boxed {Length = 5}}$