4 Herons formula allows us to find the area of a triangle when only the lengths of the three sides are given. And then this is equal to the square root of 18 times 9 times 7 times 2. 12 A rhombus shaped field has green grass for 18 cows to graze.
The formula is as follows.
Area of a triangle Herons formula Area of a triangle given base and angles. Area of a parallelogram given base and height. S abc2 Area S x S - a x S - b x S - c Where a Side A b Side B c Side C S Area of Triangle. A SquareRoot s s - a s - b s - c.