The ratios of corresponding sides in the two triangles are equal. Triangles F G E and I J H are shown. The length of side G F is 15 and the length of side I J is 10. The length of F E is 30 and the length of I H is 20. What other information is needed to prove that △FGE ~ △IJH by the SAS similarity theorem? ∠F ≅ ∠J ∠I ≅ ∠F ∠E ≅ ∠H ∠G ≅ ∠I

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.

Are you asking for 6 or 15?