3 years ago

How do you find the missing angles measure(s) ?

Mathematics

1 answer:

AleksAgata [21]3 years ago

8 0

Answer:

some of the angles are congruent, but for number 10, it would be 55 and number 11 would be 75 and 75

Step-by-step explanation:

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3 years ago

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$\overline {DE} \parallel \overline{AB}$ because $\frac{EC}{DC} = \frac{AC}{BC}$ .

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According to the Theorem of Thales and definition of proportionality, $\overline {DE} \parallel \overline{AB}$ if and only if $\frac{EC}{DC} = \frac{AC}{BC}$ . If we know that $EC = 15\,cm$ , $DC = 20\,cm$ , $BC = 36\,cm$ and $AC = 27\,cm$ , then we have the following result:

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