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14-11-2020
Mathematics

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What is the length of of BC? with work pls help

What is the length of of BC with work pls help class=

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SageRage SageRage

14-11-2020

Answer:

31

Step-by-step explanation:

Assuming the drawing is to scale

The triangle is equilateral according to measure, So the measure of angles A, B and C are the same and the lengths of sides AB, BC and BA are equal
There is very little information to go off, so the measurements are done with a ruler etc.
With that in mind, this means AC=BC, ergo [tex]6x-5=4x+7[/tex]
So, [tex]6x-4x=7+5[/tex] then [tex]x=6[/tex]
Plugging that back into BC, we have [tex]4(6)+7=24+7=31[/tex]

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