D is mid-point of AB. DE II BC, if AE = 2.8 cm, then AC = ?
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Answer:
5.6 cm
Step-by-step explanation:
D is the mid point of AB (given )
therefore, AD=BD ------- equation 1
DE || BC (given)
AD/ BD = AE/ EC ( basic proportionality theorem )
from equation 1 we get,
AD/AD = AE/ EC
1 /1= 2.8 / EC
1= 2.8 / EC
EC= 2.8 cm
AC= AE+EC
AC= 2.8+2.8
AC = 5.6 cm
Hope this hepls
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