Tirrh dQ dei ba cgnh cta tam grdc 116.. H6i 1 ounce ving bing bao nhi6u lucrng vang?. HAy lim trdn tiri ch* s6 thfp phdn thri hai.. Tiaphran gi6c cba g6cBAC c6tBC tai D.. Chimg minh AADB
Trang 1'
PrroNG crao puc vA oAo rao
pt csfNgrgrlc
(g6m 01 trang)
C6u 1: (2,5 diiin )
ThUc hi€n cdc phdp tinh sau:
BB KrEs{ TRd Hqc Lf 1
NAM Hoc 2ot9 -202a
mox: rbAN - KHor T Ngay kidm tra: 15 thdng 12 ndm20l9
gMfi 90 phtu fthdng kd thdi gian phdt da)
203.492 a) lr-2)'-r'l)'.l, o,
[ si \.2) ]'zt
,/0,2-s +(-2o1ef
[-}).l +i
b)
143.(-r4
c)
Ciru}: Q,A di€m)
Tlm x, bi€t :
a) -r tzl++
I rl
b) lx-al+0,7s=1.7s
I 4l
Ciu3 (1,5 dt6ru)
a) MdJ t*rn gi6c c6 chu vi li 63 cm vd ba carh cria n5 ti lQ r,6i 5; 7 ; 9 Tirrh dQ dei ba cgnh
cta tam grdc 116.
b) Cho biilt I ounce (vlng ) cin npng31, fi34768 g vA 1 lugng viurg cdn n{ng 37,59 H6i
1 ounce ving bing bao nhi6u lucrng vang ? HAy lim trdn tiri ch* s6 thfp phdn thri hai.
Cia 4t (1,0 didtn)
Hinh r,6 b6n bi6u di6a m{.t c& ngang
cta rnQt con dC De do 96o r:hqn MOP t4o
- ,!
boi m4t phdng nghidng cua con d0 r,di
phuo'ng nim ngang, ngudi ta dtng thu6c cht
T vd d{t nhu hinh vE (oArAB) Tinh g6c
MOP, bi6t ring ddy dqi BC t4o vdi tryc BA
mQt g6c idt : tzo
Cdu 5: {j,A di6m)
Cho tam gi6c ABC cO a6c =700 vd aCA =:00 Tiaphran gi6c cba g6cBAC c6tBC tai D a) Tinh sd do g6c BAC vi g6c ADC
b) Tr€n tia AC l6y di6m E sao cho AE = AB Chimg minh AADB : AADJ.
c) qua e vE du&rg thing song song vdi SC c*t aD @i I Tr6n do4n thEng DC 16y di6m K
sao cho DK: EI Chrlng miah: eAo: KEc
-H6,r'-([Igc sink kh\etg itztqc sir dung tdi liiu - Gidw ifti kh&ng gi6i tktcll gi th4m)
E
Ll
-Trudng:
Hg t6n hgo sinh: " 50 bao c3nn: