Question

初一数学题《图形的初步知识》15如图,线段AB=10cm.在线段AB上取一点C,使AC=3cm,并取BC的中点D,求AD

Answer 1

因为AB = 10

AC = 3

所以 BC = AB-AC = 10 - 3 =7

因为D是BC的中点

所以 CD =BD = 3.5

所以AD = AC+CD = 3+3.5 =6.5CM