tolong jawab soal matematika di atas

a) x =√12²+5²=√144+25=√169=13
b) x =√30²+16²=√900+256=√1156=34
c) x =√7,5²-6²=√56,25-36=√20,25=4,5
d) x =√6,5²-2,5²=√42,25-6,25=√36=6

in sha allah, jawabanyya itu