JSFiddle - React, Tailwind, and code Playground
JavaScript
// get hypotenuse from base and 2 angles
A = 90;
B = 45;
C = 180 - A - B;
// we now have 3 angles
base = 200;
height = (base * Math.sin(A))/Math.sin(C);
hypotenuse = Math.sqrt(Math.pow(height,2) + Math.pow(base,2));
alert(hypotenuse);