Answer:
A) 92
Step-by-step explanation:
A full revolution is shown which means it should add up to 360.
To find b, subtract 227 and 41 from 360:
360 = 227 + 41 + b
b = 92
Answer:

Step-by-step explanation:
Let the three sides be a, b and c respectively.
Such that:



Required
Determine the area
This is calculated as:

Where

Substitute values for a, b and c



Substitute values for a, b, c and s in




-- Approximated
If the same number of people are in 6 rows, and we're asked to find how many people are in 12 rows, we can simply multiply that number by 2.
<h3>239 * 2 = 478</h3>