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As shown in the figure, two points B and C divide the line ad into three parts of 2:3:4, e is the midpoint of the line ad, EC = 1.5cm, find the length of CD
Length of segment ad: 2 + 3 + 4 = 9 copies
Midpoint: 9 △ 2 = 4.5 parts
AC length: 2 + 3 = 5
EC: 5-4.5 = 0.5 parts
1 portion: 1.5 △ 0.5 = 3
CD length 4 copies: 4x3 = 12 (CM)
As shown in the figure, B and C divide the line ad into three parts: 2:3:4 & nbsp; m is the midpoint of AD, CD = 8, and find the length of MC______ ．
The total length is: 8 △ 4 × (2 + 3 + 4) = 18, MD = 18 △ 2 = 9, MC = md-cd = 9-8 = 1
As shown in the figure, two points B and C divide the line segment ad into three parts: 2:3:4. M is the midpoint of AD, CD = 9. Find the length of the line segment MC
|----|------|--|----|
A B M C D
AB:BC:CD=2:3:4 CD=9
AB=1/2CD=4.5 BC=3/4CD=6.75
AD=AB+BC+CD=20.25
M is the midpoint of AD
MD=1/2AD=10.125
MC=MD-CD=1.125
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