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puc
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1:
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ThUc hi€n cdc
phdp tinh
sau:
BB KrEs{ TRd
Hqc Lf
1
NAM
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mox:
rbAN
-
KHor
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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
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,/0,2-s
+(-2o1ef
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+i
b)
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I I
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-r
+
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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
$.t
51
t) r
-Trudng:.....
Hg t6n hgo
sinh:........
"
50 bao c3nn:
