The exposure triangle is 3 components that come together to make a quality photo. They are called iso, shutter speed. All three put together make a sharp/crisp photo. you can do anything to make a photo that is crisp a photo that is blurry e.x.t. But the exposure triangle helps us to find out what kind of photo we want.
This is a little video showing how a camera works and explains the basics.
this is an contact sheet. it is a sheet that shows images that i took and what i think of them