Gocu5076
20.10.2019 •
Mathematics
What is the length of ac?
a. 128
b. 136
c. 108
d. 144
Solved
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Ответ:
d. 144
Step-by-step explanation:
Triangle ABC and DCE are similar, that is, SSA
Therefore;
AB corresponds to DE, and AC corresponds to CE
Thus;
AB/DE = AC/CE
84/7 = (156-x) /x
cross multiplication;
84 x = 7(156-x)
84 x = 1092 -7x
91 x = 1092
x = 12
Therefore AC = 156 -12
= 144
Ответ: