The given line AB 2cm extends AB to C, making AB to C, making BC = 2 / 1 × AB, and then extends AC to D in reverse, making ad = 2 / 1 × AC 【1】 Draw this picture 【2】 Finding the length of line segment ad
|______ |________ |____ | (AB=2,BC=1,CD=1.5)
D A B C
Question 2: ∵ AB = 2cm
∴BC=1/2*AB=1/2*2=1cm
∴AD=1/2*AC=1/2*(AB+BC)=1/2*(2+1)=1.5cm
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