Question

What is the perimeter of the quadrilateral if the two triangles are congruent using SSS

Answer 1

Answer:

20 units (I used units because that's what i was taught when there isn't a specific unit)

Step-by-step explanation:

If the triangles are congruent, that means that everything is congruent/the same. So what we do is, we set both equations equal to each other.

6x - 3 = 4x + 9

And now we simplify.

6x - 3 = 4x + 9

-4x         -4x

--------------------

2x - 3 = 9

    +3     +3

-------------------

2x = 12

÷2      ÷2

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x = 6

To find the perimeter, just multiply 6 by 4 since there's four sides. 6 x 4 = 20