matt9228475 matt9228475

19-11-2018
Mathematics

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what is the length of side AC of the triangle?

what is the length of side AC of the triangle class=

Respuesta :

yves379 yves379

19-11-2018

The answer is 25 units

Explanation:

As shown in the figure, angle A is congruent to angle C.

so the triangle is isosceles.

ABC is isosceles, so AB = BC

Finding x:

5x + 5 = 7x - 1

5x - 7x = -1 -5

-2x = -6

2x = 6

x = 6/2 = 3

AC = 6x +7 we have x = 3

So:

AC = 6×3 +7 = 18 + 7 = 25 units

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