Question

What is the length of cd?

Answer 1

`BC=√(5)`

Explanation:

so we have B=(5,1) and C=(7,2)

we can use the distance formula

`P(xy)=\sqrt{(x_1-x_2)^(2)+(y_1-y_2)^2 } \\\\P(BC)=\sqrt{(5-7)^(2)+(1-2)^2 } \\\\P(BC)=\sqrt{(-2)^(2)+(-1)^2 }\\\\P(BC)=√(4+1)\\\\P(BC)=√(5)`

Answer 2

a length of a cd is 6 inches

Explanation: