Find the area of the shaded region, round to two decimals​

A = 660.72 in^2 - A = 98 in^2 = 562.7 in^2

Step-by-step explanation:

Formula for a seven sided polygon/heptagon is:

A = (1/4)na^2 cot(π/n) = nr^2 tan(π/n

nn = 7 sides

side lengtha = 13.4841 in

inradiusr = 14 in

circumradiusR = 15.5388 in

areaA = 660.72 in^2

perimeterP = 94.3886 in

interior anglex = 128.571 °

exterior angley = 51.4286 °

To calculate the square from a diameter use this formula: q = √(2a^2) = a√2

side lengtha = 9.8994949366117 in

diagonalq = 14 in

perimeterP = 39.597979746447 in

areaA = 98 in^2

10

Step-by-step explanation:

"three times r" = 3r

"three times r minus ten" = 3r - 10

"product of 5 and the difference of three times r minus ten"

= 5 (3r - 10)

given that r = 4,

the expression becomes

5 (3r - 10)

= 5 [3(4) - 10]

= 5 [12 - 10]

= 5 (2)

= 10