heshott91
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The legs of an isosceles triangle have lengths x + 1 and -x + 7 . The base has length 3x - 3. What is the length of the base?

A. 6 B. 4 C. Cannot be determined D. 3

Respuesta :

Roaa
Since this is an isosceles triangle, then the lengths of both legs are equal
Therefore,
x+1=-x+7
2x=6
x=3
Therefore, the length of the base is:
3x-3=3(3)-3=6
Then your answer is (A)
x+1=-x+7
2x=6
x=3 then 3x-3=3×3-3
=9-3
=6