Hi Karen,

Since you know the lengths of the sides of the triangle you can use Heron's Formula to find its area. I got 1,340 square feet. (You should check my arithmetic.) Now you need a conversion from square feet to acres. You can use a reference book but I prefer using the internet. I could type what is 1340 square feet in acres? into the Google search window but I'm a Mac user so I would just say Hey Siri, what's one thousand three hundred and forty square feet in acres?

I hope this helps,
Harley