10 Piv txwv ntawm Cov Lus Nug Txog Qhov Chaw Nruab Nrab
1. Cov kev sib koom ua ke Qhov chaw ntawm lub ntiajteb txawj nqus yam khoom hais txog qhov taw tes 0 yog…
Kev Sib Tham
Nws yog paub :
Thaj chaw ntawm yam khoom (A) = (8)(4) = 32
Nruab nrab ntawm x-axis (x) = ½ (8) = 4
Nruab nrab ntawm txoj kab y (y)= ½ (4) = 2
Nug : Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom nrog rau qhov taw tes 0
Jawb :
2. Qhov Chaw qhov chaw ntawm lub ntiajteb txawj nqus ntawm ib yam khoom rau qhov taw tes 0 yog…
Kev Sib Tham
Ua ntej, xam qhov siab ntawm yam khoom. Faib yam khoom ua ob lub duab peb ceg uas muaj kaum sab xis, qhov twg txhua lub duab peb ceg uas muaj kaum sab xis muaj lub hauv paus ntawm 4 cm thiab lub hypotenuse ntawm 5 cm.
Nws yog paub :
Thaj chaw ntawm yam khoom (A) = ½ (hauv paus) (qhov siab) = ½ (8)(3) = (4)(3) = 12
Nruab nrab ntawm x-axis (x) = ½ (8) = 4
Nruab nrab ntawm txoj kab y (y) = 1/3 (3) = 1
Nug : Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom nrog rau qhov taw tes 0
Jawb :
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom yog (4, 1) cm.
3. Saib daim duab hauv qab no! Txheeb xyuas (a) qhov chaw ntawm qhov chaw nruab nrab ntawm lub ntiajteb txawj nqus ntawm yam khoom piv rau qhov chaw P (b) qhov chaw ntawm qhov chaw nruab nrab ntawm lub ntiajteb txawj nqus ntawm yam khoom piv rau sab PQ.
Kev Sib Tham
Nws yog paub :
Faib cov khoom ua ob ntu, ntu 1 = lub duab plaub fab, ntu 2 = lub duab plaub fab.
A1 = (6)(2) = 12
A2 = (2)(2) = 4
x1 = ½ (6) = 3
x2 = ½ (2) + 2 = 1 + 2 = 3
y1 = ½ (2) = 1
y2 = ½ (2) + 2 = 1 + 2 = 3
Nug : Cov coordinates ntawm qhov chaw ntawm lub ntiajteb txawj nqus piv rau sab PQ
Jawb :
(a) Qhov chaw ntawm qhov chaw nruab nrab ntawm lub ntiajteb txawj nqus ntawm yam khoom piv rau qhov chaw P yog (3; 1,5) cm.
(b) Qhov chaw ntawm qhov chaw nruab nrab ntawm lub ntiajteb txawj nqus ntawm yam khoom piv rau sab PQ yog 1,5 cm
4. 2015/2016 SMA/MA Physics Kev Xeem Hauv Tebchaws Cov Lus Nug No. 10
Saib daim duab hauv qab no!
Cov coordinates ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm lub dav hlau H-puab yog ...
A. (3; 4)
B. (3,5 ; 2,5)
C. (3,5 ; 4)
D. (4 ; 3)
E. (4 ; 4)
Kev Sib Tham
Faib cov khoom ua peb ntu.
Thaj tsam ntawm ntu 1 (A 1 ) = (2)(6) = 12 cm 2
Qhov nruab nrab ntawm ntu 1 ntawm x-axis (x 1 ) = 1/2 (2) = 1 cm
Qhov nruab nrab ntawm ntu 1 ntawm y-axis (y 1 ) = 1/2 (6) = 3 cm
Thaj tsam ntawm ntu 2 (A 2 ) = (4)(2) = 8 cm 2
Qhov nruab nrab ntawm ntu 2 ntawm x-axis (x 2 ) = 2 + (1/2)(4) = 2 + 2 = 4 cm
Qhov nruab nrab ntawm ntu 2 ntawm y-axis (y 2 ) = 2 + (1/2)(2) = 2 + 1 = 3 cm
Thaj tsam ntawm ntu 3 (A 3 ) = (2)(6) = 12
Qhov nruab nrab ntawm ntu 3 ntawm x-axis (x 3 ) = 2 + 4 + (1/2)(2) = 2 + 4 + 1 = 7 cm
Qhov nruab nrab ntawm ntu 3 ntawm y-axis (y 3 ) = 1/2 (6) = 3 cm
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom ntawm x-axis:
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom ntawm y-axis:
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm lub dav hlau H-zoo li yog (x, y) = (4, 3)
Cov lus teb yog D.
5. 2014/2015 SMA/MA Physics Kev Xeem Hauv Tebchaws Cov Lus Nug No. 6
Saib seb thaj chaw sib npaug zos li cas nrog rau qhov ntev raws li pom hauv daim duab!
Qhov chaw ntawm qhov chaw nruab nrab ntawm lub ntiajteb txawj nqus ntawm cov duab saum toj no piv rau x-axis yog….
A. 2,0 cm
B. 2,5 cm
C. 3,0 cm
D. 3,5 cm
E. 4,0 cm
Kev Sib Tham
Faib cov khoom ua 4 ntu, uas yog A, B, C thiab D.
Xam thaj tsam ntawm txhua ntu.
A A = ½ (hauv paus)(qhov siab) = ½ (1,5)(3) = (1,5)(1,5) = 2,25
A B = (ntev)(dav) = (4,5-1,5)(1) = (3)(1) = 3
A C = ½ (hauv paus)(qhov siab) = ½ (6-4,5)(3) = (1,5)(1,5) = 2,25
A D = ½ (hauv paus)(qhov siab) = ½ (4,5-1,5)(6-3) = ½ (3)(3) = (1,5)(3) = 4,5
yA = 1/3 (3) = 1
yB = 1/2 (1) = 0,5
yC = 1/3 (3) = 1
y D = 3 + (1/3)(6-3) = 3 + (1/3)(3) = 3 + 1 = 4
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom ntawm y-axis:
Qhov chaw ntawm qhov chaw nruab nrab ntawm lub ntiajteb txawj nqus ntawm cov duab piv rau x-axis yog 2 cm.
Cov lus teb yog lawm yog A.
6. 2014/2015 SMA/MA Physics Kev Xeem Hauv Tebchaws Cov Lus Nug Naj Npawb 6
Saib daim duab!
Cov coordinates ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov duab hauv qab no yog ....
Kev Sib Tham
Faib cov khoom ua 4 ntu, uas yog A, B, C thiab D.
Xam thaj tsam ntawm txhua ntu.
AA = (ntev)(dav) = (4)(3) = 12
A B = ½ (hauv paus)(qhov siab) = ½ (6-4)(3) = ½ (2)(3) = (1)(3) = 3
A C = ½ (hauv paus)(qhov siab) = ½ (8-6)(3) = ½ (2)(3) = (1)(3) = 3
A D = (ntev)(dav) = (8)(6-3) = (8)(3) = 24
yA = 1/2 (3) = 1,5
yB = 3 – (1/3)(3) = 3 – 1 = 2
yC = 3 – (1/3)(3) = 3 – 1 = 2
y D = 3 + (1/2)(6-3) = 3 + (1/2)(3) = 3 + 1,5 = 4,5
xA = 1/2 (4) = 2
xB = 4 + (1/2)(6-4) = 4 + (1/2)(2) = 4 + 1 = 5
xC = 6 + (1/2)(8-6) = 6 + (1/2)(2) = 6 + 1 = 7
x D = 1/2 (8) = 4
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom ntawm x-axis:
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom ntawm y-axis:
Cov lus teb yog B.
7. Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom sib xws hauv daim duab hauv qab no yog ...
A. (14, 15)
B. (17, 11)
C. (15, 11)
D. (15, 7)
E. (11, 7)
Kev Sib Tham:
Faib cov khoom ua peb ntu, txhua ntu muaj thaj tsam (10-0)x(10-0), (20-10)x(30-0), (30-20)x(10-0)
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom piv rau x-axis:
x1 = qhov deb ntawm qhov chaw nruab nrab ntawm thaj chaw 1 ntawm qhov chaw 0, x2 = qhov deb ntawm qhov chaw nruab nrab ntawm thaj chaw 2 ntawm qhov chaw 0, x3 = qhov deb ntawm qhov chaw nruab nrab ntawm thaj chaw 3 ntawm qhov chaw 0.
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom piv rau y-axis:
y1 = qhov deb ntawm qhov chaw nruab nrab ntawm thaj chaw 1 ntawm qhov chaw 0, y2 = qhov deb ntawm qhov chaw nruab nrab ntawm thaj chaw 2 ntawm qhov chaw 0, y3 = qhov deb ntawm qhov chaw nruab nrab ntawm thaj chaw 3 ntawm qhov chaw 0.
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom yog (15, 11)
Cov lus teb yog C.
8. Cov kev sib koom ua ke ntawm qhov chaw nruab nrab ntawm lub ntiajteb txawj nqus ntawm cov khoom hauv daim duab hauv qab no yog...
A. (3 ; 2,7) m
B. (3 ; 3,6) m
C. (3 ; 4,0) m
D. (3 ; 4,5) m
E. (3 ; 5,0) m
Kev Sib Tham:
Faib cov khoom ua ob ntu, txhua ntu muaj thaj tsam ntawm (5-1)x(3-0), ½ (6-0)x(9-3)
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom piv rau x-axis:
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom piv rau y-axis:
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom yog (3; 3,6)
Cov lus teb yog B.
9. Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm ib yam khoom sib xws piv rau qhov taw tes O hauv daim duab hauv qab no yog...
A. (4 3/5, 3 3/5)
B. (4 1/3, 3 1/3)
C. (4 1/3, 3)
D. (3 1/3, 4 1/3)
E. (3, 3 2/3)
Kev Sib Tham
Faib cov khoom ua peb ntu, ntu 1 = lub duab plaub fab, ntu 2 = lub duab plaub fab, ntu 3 = lub duab plaub fab.
Thaj chaw ntawm ntu 1 (A1) = (2-0)(8-0) = (2)(8) = 16
Qhov nruab nrab ntawm ntu 1 ntawm x-axis (x1= 1 TZS
Qhov nruab nrab ntawm ntu 1 ntawm y-axis (y1= 4 TZS
Thaj chaw ntawm ntu 2 (A2) = (4-2)(2-0) = (2)(2) = 4
Qhov nruab nrab ntawm ntu 2 ntawm x-axis (x2= 3 TZS
Qhov nruab nrab ntawm ntu 2 ntawm y-axis (y2= 1 TZS
Thaj chaw ntawm ntu 3 (A3) = (6-4)(8-0) = (2)(8) = 16
Qhov nruab nrab ntawm ntu 3 ntawm x-axis (x3= 5 TZS
Qhov nruab nrab ntawm ntu 3 ntawm y-axis (y3= 4 TZS
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom ntawm x-axis:
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom ntawm y-axis:
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom piv rau qhov chaw O yog (x, y) = (3, 3 2/3)
Cov lus teb yog yog E.
10. Cov kev sib koom ua ke ntawm qhov chaw nruab nrab ntawm lub ntiajteb txawj nqus ntawm daim duab dav hlau hauv qab no yog….
A. (1 1/2, 1 1/2) cm
B. (2.1/2) cm
C. (2, 1 1/2) cm
D. (2 1/2, 1 1/2) cm
E. (2 1/2, 2 1/2) cm
Kev Sib Tham
Faib cov khoom ua peb ntu, ntu 1 = lub duab plaub fab, ntu 2 = lub duab plaub fab, ntu 3 = lub duab plaub fab.
Thaj chaw ntawm ntu 1 (A1) = (1-0)(3-0) = (1)(3) = 3
Qhov nruab nrab ntawm ntu 1 ntawm x-axis (x1= 0,5 TZS
Qhov nruab nrab ntawm ntu 1 ntawm y-axis (y1= 1,5 TZS
Thaj chaw ntawm ntu 2 (A2) = (3-1)(2-1) = (2)(1) = 2
Qhov nruab nrab ntawm ntu 2 ntawm x-axis (x2= 2 TZS
Qhov nruab nrab ntawm ntu 2 ntawm y-axis (y2= 1,5 TZS
Thaj chaw ntawm ntu 3 (A3) = (4-3)(3-0) = (1)(3) = 3
Qhov nruab nrab ntawm ntu 3 ntawm x-axis (x3= 3,5 TZS
Qhov nruab nrab ntawm ntu 3 ntawm y-axis (y3= 1,5 TZS
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom ntawm x-axis:
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm cov khoom ntawm y-axis:
Cov kev sib koom ua ke ntawm qhov chaw ntawm lub ntiajteb txawj nqus ntawm yam khoom yog (x, y) = (2, 1 1/2)
Cov lus teb yog C.
Qhov chaw nug lus:
Cov Lus Nug Txog Kev Xeem Physics Hauv Tebchaws Rau Tsev Kawm Ntawv Theem Siab/Tsev Kawm Ntawv Theem Siab Ua Haujlwm
