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What is ​ BC ​?


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An isosceles triangle A B C. Side B C is the base. Vertex A is below base B C. Sides A B and A C are equal. Sides A B and A C are labeled with single tick marks. Side A B is labeled as 8 x minus 4, side A C is labeled as 5 x plus 11, and side B C is labeled as 4 x minus 2.

What is BC Enter your answer in the box An isosceles triangle A B C Side B C is the base Vertex A is below base B C Sides A B and A C are equal Sides A B and A class=

Respuesta :

BC = 18

AB = AC, hence

8x - 4 = 5x + 11 ( subtract 5x from both sides )

3x - 4 = 11 ( add 4 to both sides )

3x = 15 ( divide both sides by 3 )

x = 5

BC = 4x - 2 = (4 × 5 ) - 2 = 20 - 2 = 18

Answer:

BC = 18 units

Step-by-step explanation:

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