the length of a leg of an isosceles triangle is twice the length of the base. What is the minimum length of the base if the perimeter is at least 20cm?

Question

anonymous · Answer

use an inequality to solve

campbell_st · Answer

|dw:1350277845476:dw|

solve for x

anonymous · Answer

can you walk me through it?

campbell_st · Answer

well let the base = x

so the equal sides of the isosceles triangle must be 2x

and if the perimeter is at least 20

then by adding the side lengths

2x + 2x + x >= 20

does that make sense?

anonymous · Answer

nope. why did you put in an equal sign?

campbell_st · Answer

because the question says at least 20... so it can be 20 or more.... thats why my inequality is greater than or equal to

anonymous · Answer

ok