+0

# What is BC ?

0
46
2
+362

What is BC ?

AngelRay  Nov 4, 2017
Sort:

#1
+443
+1

This is an isosceles triangle. That means the 2 sides touching the = angles have equal length. That means we know $$4x+4=6x-14$$ .

To solve, we need to find x. I'll just quickly go through this: $$4x+4=6x-14\rightarrow4 = 2x - 14\rightarrow18=2x\rightarrow x=9$$ .

Now that we have x by setting the 2 sides equal to each other, we know the length of the bottom side by substituting 9 in for x, giving us $$2x+7=2(9)+7=18+7\rightarrow x =24$$ .

helperid1839321  Nov 4, 2017
#2
+78762
+1

Angle ABC  = Angle ACB...so....AB = AC.....so

4x + 4  = 6x - 14         add 14 to both sides, subtract 4x from both sides

18  = 2x    ⇒    x  = 9

So

BC  =   2x + 7   =    2*9 + 7  =  25

CPhill  Nov 4, 2017

### 5 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details