For the first picture using Pythagorean Theorem, we know that a^2 + b ^2 = c^2 but since we only know c ( 99.2) and b ( 62 ) we need to use the theorem to find a the equation we use for that is :
A = square root of ( c^2 - B^2 )
A = 77.44
Mainly all you do is subtract , and it'll give you the right estimate
321 / 100 = 3.21 as you are dividing by 10, and then 10 again
Add the mother's height or the fathers height in either inches or centimeters