Quandaries
and Queries 

1.use the heron's formula to find area of triangle ABC to nerest tenth A.a=21 b=28 c=11 B.a=23 b=28 c=12 2.Find the nearest tenth the altitude of the longest side if a=3 b=3 c=5 3.the length of each side of a rhombus is 10 cm the length of one diagonal is 12 cm find the area to the nearest square centermeter 

Hi, You can find Heron's formula in the answer to a pervious question. I can see two ways to solve the second problem.
The second solution uses Heron's formula.
For 3 draw a diagram. You will see that the diagonal cuts the rhombus into two congruent triangles. You can again use Heron's formula to find the area of the triangle. Penny 

