3rd question answer,please
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From the figure,
x+z = 10 cm.......... (1)
x+y = 12 cm.......... (2)
y+z =8 cm
y = 8-z
Substitute the value of y in (2)
x+8-z =12
x=12-8+z
x=4+z
Now substitute the value of x in (1)
4+z+z=10
2z = 6
z=3 cm
Therefore, x=4+z = 4+3 = 7 cm
y=8-z = 8-3 = 5cm
AD = x = 7 cm
BE = y = 5 cm
CF = z = 3 cm
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