Finding length of each side and the base(iso triangle)

[D!ddy]

Hi in the equation y=-(5/12)abs(x-12)+5 where y is greater or equal to 0.. i need to find the length of each side(including) the base i found the length for the sides using
side length= sqrt(12^2+5^2)
= 13

but what about the base how do i find that out without using the calculator?

Thanks for the Help,
Mo

 

[Deleted member 4993]

Hi in the equation y=-(5/12)abs(x-12)+5 where y is greater or equal to 0.. i need to find the length of each side(including) the base i found the length for the sides using
side length= sqrt(12^2+5^2)
= 13

but what about the base how do i find that out without using the calculator?

Thanks for the Help,
Mo

Plot the function.

Then you will realize that the base is created by the x-intercepts.

so set

0 = -5/12 * |x-12| + 5

and solve for 'x'. You should be able to solve the above by just observation.