## anonymous one year ago URGENT PLEASE WILL FAN AND MEDAL What is the perimeter of the polygon in the diagram?

1. anonymous

2$2\sqrt{(a-b)^2}$ $4(a+b)^2$ $2(a^2+b^2)$ $4\sqrt{a^2+b2}$

2. campbell_st

I think you need to include a diagram

3. anonymous

4. anonymous

sorry

5. campbell_st

so the shape is a rhombus find the length of the side by using pythagoras' theorem the shorter sides have lengths a and b then since all 4 sides are the same, multiply the answer from pythagoras' theorem by 4

6. anonymous

but the choices i included just dont make sense.

7. anonymous

which one is the correct pythagores therom

8. campbell_st

so pythagoras' theorem is $c^2 = a^2 + b^2~~~so ~~~ c = \sqrt{a^2 + b^2}$ to find the perimeter, multiply by 4

9. wil476003

I I believe the the answer is the last one

10. anonymous

how do u know?

11. wil476003

Because the one above explained how I was going to explain it good job campbell_st

12. campbell_st

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