What are the coordinates of the pre-image of n' if it was reflected across the y-axis, and n' has coordinates (3, -1)? explain i really need on this.

I’m which figure is point g an orthocenter

Find all the angles that satisfy the equation cos(θ)=32

The table below shows the angle measurements for triangle abc and triangle xyz. if triangle abc is similar to triangle xyz, what does angle z equal, in degrees?