Point C is a point on line AB, and point D is the midpoint of BC, if ad = 5cm, AC + AB =? We need it now

Point C is a point on line AB, and point D is the midpoint of BC, if ad = 5cm, AC + AB =? We need it now

You draw the line first, and then you find AB = ad+ BD.AC=AD -CD.
And BD = CD, so AC + AB = 2ad = 10cm