Finding angles in 3D space 1

In the next applet, you can make different triangles visible in order to aid you calculate angles.
In the rectangular prism, what is the measure of each of the following angles:
[br][math]\angle AKD[/math][br][br][math]\angle KBL[/math][br][br][math]\angle MLC[/math]

Finding angles in 3D space 2

In the triangular prism, M is the midpoint of (SE). Find the angle each of the following makes with the base plane of the prism:
ST[br][br]MG

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