Can you take a better Pic? I can’t see the values.
The angles of a triangle always equal 180.
You do 180 - 80 - 45. X = 45.
The car goes 23.2 miles every gallon, so with 15 gallons (15 * 23.2 = 348) it can go 348 miles. With the extra .25 that the car has, it can go 0.25 * 23.2 = 5.8 miles. 348 miles plus the 5.8 miles gets you 353.8 miles on 15.25 gallons.
Probably 2561 but since area equal r^2 I thought it would be 3217