00:01
So you're being asked to find the area of an equilateral triangle, meaning all the sides are the same.
00:08
So let me go ahead and draw a triangle for you.
00:13
And equilateral means all the sides are the same.
00:18
So let me make this.
00:20
So remember any kind of triangle, the area, the new formula for area is one half, side times the other side times your sign of the angle in between a and b.
00:39
And if it's a quadrilateral triangle and its lengths are 10, then that means that whichever side i take, it's 10 and in between, that's going to give you a 60 degree angle because all of the, if it's equilateral, then all the angles are equal.
00:58
So then i'm just going to plug this in into the calculator...