Help and show work <3

Abbey purchased a house using a fixed rate mortgage. the annual interest rate is 4.2% compounded monthly for 20 years. the mortgage amount is $235,000. what is the monthly payment on the mortgage? this isn't a multiple choice question have to show my work

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

How do you write a paragraph proof to prove that the corresponding angles shown are congruent