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  • 23-04-2019
  • Mathematics
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15. Find the length of segment DE of the triangle ABC.



A. 24 units
B. 32 units
C. 26 units
D. 52 units

15 Find the length of segment DE of the triangle ABC A 24 units B 32 units C 26 units D 52 units class=

Respuesta :

calculista
calculista calculista
  • 03-05-2019

Answer:

Option C. [tex]26\ units[/tex]

Step-by-step explanation:

we know that

Triangles ADE and ABC are similar by AA similarity postulate

AB=2AD

Apply proportion

[tex]\frac{AD}{AB}=\frac{8x-6}{12x+4}\\ \\\frac{AD}{2AD}=\frac{8x-6}{12x+4}\\ \\\frac{1}{2}=\frac{8x-6}{12x+4}\\ \\12x+4=16x-12\\ \\16x-12x=4+12\\ \\4x=16\\ \\x=4\ units[/tex]

Find the length of segment DE

[tex]DE=8x-6=8(4)-6=26\ units[/tex]

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