In △abc, what is the measure of c?

36°.

Since all the angles in a triangle are equal to 180°, you can find x by doing 2x+2x+6x=180.

Combine like terms and you get 10x=180. Divide both sides by 10 and you get x=18.

Sub in 18 for x at angle C and you get 2(18), which equals 36°.

Hope this helps!

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.