Răspunsuri

2014-02-16T18:21:37+02:00
A) AD patrat = BD x DC
AD patrat = 20 x 5
AD patrat = 100
AD = radical din 100 = 10 cm

b) AD patrat = BD x DC
12 patrat = 8 patrat x DC
144 = 64 x DC
DC = 144/64 = 2.25 cm