Math problem- triangle inscribed in a circle (5th grade geometry)?

I'm a math tutor and this one had me stumped. This girl i tutor is in math cl and they have been learning about circles and radiuses and geometry. she called over the phone and described a problem to me. she said she has to find the area of an equilateral triangle inscribed in a circle. Nothing is known about the circle or the triangle except that the length of all sides of the triangle is 14. Now remember, she is in 5th grade, so she can't use the pythagorean theorem OR trigonometry. How on earth will she find the area of the triangle?