Do the angles of a triangle always add up to 180?

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

How do i multiply two digit numbers