The area of the octagon below is 10,391.9 square millimeters. what is the approximate perimeter of the octagon? round to the nearest whole number. mm what is the approximate length of one side of the octagon? round to the nearest whole number. mm

the first one is 371 and the second one is 46

Step-by-step explanation:

side of the octagon = 46.38 mm

Perimeter of the octagon = 371.04 mm

Step-by-step explanation:

Area of octagon = 10,391.9 mm²

But, area of octagon is given by the formula = 2(1 + √2)side²

⇒ 2(1 + √2)side² = 10391.9

⇒ 4.83 × side² = 10391.9

⇒ side² = 2151.53

⇒ side of the octagon = 46.38 mm

Perimeter of the octagon = 8 × side

⇒ Perimeter of the octagon = 8 × 46.38

⇒ Perimeter of the octagon = 371.04 mm

idk

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.