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AC =
AC =
AC =
AC = √100
AC = 10 cm
B. Mencari panjang CF
-------------- jika tidak terlihat,, >> AC/DC = DC/CF
>> 10/6 = 6/CF
10 CF = 6 × 6
CF = 36 ÷ 10
CF = 3.6 cm
C. Mencari panjang AE
----------- jika tidak terlihat,, >> AC/AB = AB/AE
10/6 = 6/AE
10 AE = 6 × 6
AE = 36 ÷ 10
AE = 3.6 cm
D. Luas ΔADF
= 1/2 × a × t
= 1/2 × AF × DF
// AF = AC - AE -CF
AF = 10 - 3.6 - 3.6
AF = 10 - 7.2
AF = 2.8 cm
// panjang DF
DF =
DF =
DF = √23.04
DF = 4.8
L = 1/2 × 2.8 × 4.8
L = 1/2 × 13.44
L = 6.72 cm²
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