please quick help with this question ?!|
What is the length of the base of a triangle with height 11 cm and area 137.5 cm2?

Question

please quick help with this question ?!|
What is the length of the base of a triangle with height 11 cm and area 137.5 cm2?

hero · Answer

$A_{\triangle} = \dfrac{bh}{2}$ where

A = area of the triangle
b = base of the triangle
h = height of the triangle

hero · Answer

@Autobee7128, you are given the area and height of the triangle and asked to find the base of the triangle, right?

anonymous · Answer

Yeah i need to find the base

hero · Answer

Okay, so the first thing we should do is isolate b. Do you know how to do that?

anonymous · Answer

not sure

hero · Answer

To isolate b, Multiply both sides by 2, then divide both sides by h. Upon doing so, you get:

$\dfrac{2A_{\triangle}}{h} = b$

hero · Answer

Right @Autobee7128? Are you still here?

anonymous · Answer

yeah so whats the next step?

hero · Answer

The next step is to plug in the given values for the Area and the height, then solve for b. In this case, 

A = 137.5
h = 11

hero · Answer

Would you like to plug those values in and calculate b?

hero · Answer

Because, you know, after plugging those values in, you'd have

$\dfrac{2(137.5)}{11} = b$

Then you could find the value of b using a calculator. Also, remember, the units for b is cm.

anonymous · Answer

I was just about to do that. But thanks anyways !! You were very helpful :)

hero · Answer

You're welcome. By the way, what value did you get for b?

anonymous · Answer

25 !