Question

AM neoive unrgent de ex 2 pls

Answer 1

a) BC²=AC²+AB²
BC²=20²+15²
BC²=400+225
BC²=625=>BC=√625=>BC=25
AB²=BD×BC
15²=BD×25
225=BDX25=>BD=225:25=>BD=9
CD=BC-BD
CD=25-9
CD=16
AD²=BD×DC
AD²=9×16
AD²=144=>AD=√144=>AD=12

b) AC²=BC²-AB²
AC²=100-36
AC²=64=>AC=√64=>AC=8
AB²=BD×BC
36=BD×10=>BD=3,6
DC=BD-DB
DC=10-3,6
DC=6,4
AD²=BD×DC
AD²=3,6×6,4
AD²=23,04=>AD=√23,04

c)AC²=DC×BC
36=3×BC=>BC=36:3=>BC=12

BD=BC-DC
BD=12-3
BD=9
AB²=BC²-AC²
AB²=144-36
AB²=108=>AB=√108=>AB=6√3
AD²=DC×BD
AD²=3×9
AD²=27=>AD=√27=>AD=3√3
d) nu stiu pt ca nu am nici un fel de date lasate in tabel
e) BD²=AB²-AD²
BD²=900-576
BD²=324=>BD=√324=>BD=18

AD²=BD×DC
576=18×CD=>DC=576:18=>DC=32
BC=CD+DB
BC=32+18
BC=50
AC²=BC²-AB²
AC²=2500-900
AC²=1600=>AC=√1600=>AC=40

f) AB²=AD²+BD²
AB²=16+16
AB²=32=>AB=√32=4√2
AB²=BD×BC
32=4XBC
BC=32:4
BC=8
CD=BC-BD
CD=8-4
CD=4
AC²=BC²-AB²
AC²=64-32
AC²=32=>AC=√32=>AC=4√2