Hello, algebra2!
We have a regular octagon with side 2.Code:A 2 H *---* 2/ | \ B *---*P * G 2| | | | | | C *---*Q * F 2\ | / *---* D 2 E
Draw
Draw
We have isosceles right triangle with hypotenuse 2.
. . Hence: .
Similarly: .
Hence: .
. . Therefore: .
In right triangle
. . Therefore: .