Answer:
That would be 530.93
Step-by-step explanation:
420 is the least common multiple for 21, 28, 35
Answer:
Use Heron's formula; see below.
Step-by-step explanation:
Use Heron's formula.
Let the sides of the triangle have lengths a, b, and c.


Example:
A triangle has side lengths 3, 4, and 5 units.
Find the area of the triangle.







