The challenge
Find the total sum of internal angles (in degrees) in an n-sided simple polygon.
N will be greater than 2.
The solution in Golang
Option 1:
package solution
func Angle(n int) int {
return (n - 2) * 180
}
Option 2:
package solution
func Angle(n int) (r int) {
r = (n-2)*180
return
}
Option 3:
package solution
func Angle(n int) int {
return (n/2-1) * 360 + n%2 * 180
}
Test cases to validate our solution
package solution_test
import (
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("Basic tests", func() {
It("Angle(3)", func() { Expect(Angle(3)).To(Equal(180)) })
It("Angle(4)", func() { Expect(Angle(4)).To(Equal(360)) })
})
