Given the line segment AB, extending AB to C is BC = 1 / 3AB, and D is the midpoint of AC. if DC = 4cm, then the length of AB is Come on, come on, come on Given the line segment AB, take a point C on the extension line of AB, which is BC = 2Ab, and then add a point D on the extension line of Ba, so that Da = AC, then add 100 in 30 minutes

Given the line segment AB, extending AB to C is BC = 1 / 3AB, and D is the midpoint of AC. if DC = 4cm, then the length of AB is Come on, come on, come on Given the line segment AB, take a point C on the extension line of AB, which is BC = 2Ab, and then add a point D on the extension line of Ba, so that Da = AC, then add 100 in 30 minutes

Because D is the midpoint of AC
So ad = DC = 4cm, then AB = AD + DC = 8cm
Because BC = 1 / 3AB
So AB = 3bC = 3 / 4AB = 3 / 4 times 8cm = 6cm