zalvinx zalvinx

16-12-2020
Mathematics

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If angle DEF is an isosceles triangle with DE congruent to EF, Find x

If angle DEF is an isosceles triangle with DE congruent to EF Find x class=

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Imstillhuman Imstillhuman

17-12-2020

Answer:

Fourth choice, 16

Step-by-step explanation:

The 2 angles are both 74 degrees, so the side that is facing each angle will be the same length, so:

9x - 73 = 3x + 23

add 73 to both sides

9x = 3x + 96

subtract 3x from both sides

6x = 96

divide by 6

x = 16

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