Step-by-step explanation:
The sum of the interior angles of a convex regular polygon is 180 times (n-2), where n is the number of sides. Since we already know the sum, we can write 3,960 = 180(n-2). If you solve for n in this equation, you will have the number of sides.
Answer:
393.75
Step-by-step explanation:
to find the volume of a rectangular prism, multiply all values by each other.
Answer:
480 km
Step-by-step explanation:
The ratio of their perimeters would also be 5:9.
To prove this assume one triangle has lengths 5x, 5x, and 5x. That means the other triangle would have 9x, 9x, and 9x. If you add up the lengths of the first triangle you would get 15x and if you add up the lengths of the second triangle you would get 27x. Let's put that in ratio form:
15x : 27x
divide both sides by x
15:27
divide both sides by 3
5:9
Fist if there is 4 sides on the base you would divide 216/4 =54
Or if there are 2 sides you would divide 216/2= 108