TRNG TRUNG HC PH THNG NINH HI

Ngi thc hin: CHU NGC HNG

2009

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PHN 1: M U

Qua nhiu nm nghin cu phn mm GSP v nhng t tp hun, hng dn cho gio

vin s dng phn mm ny ti cm nhn c s cn thit phi vit thm mt s hng dn

ca phn mm ny mt cch chi tit hn nhm h tr cho gio vin v hc sinh tip cn phn

mm mt cch d dng hn, trc quan hn, to c hng th cho ngi s dng.

Ti cng thy c mt s nhu cu cp thit ca ngi s dng phn mm nh sau:

- Lm sao dng hnh mt cch nhanh nht?

- Lm sao son cc trnh din mang tnh tng tc vi ngi hc t hiu qu cao?

- Cch xy dng nhng cng c phc v cho vic son ging hiu qu hn?

- Lm th no xem cch thit k ca ngi khc?

- Lm sao xy dng cc tng?

Vi nhng i hi trn v pha ngi mun s dng phn mm GSP, ti bin son mt

ti liu nh sau:

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PHN 2: LM QUEN VI PHN MM GSP 2.1 GIAO DIN CA GSP Khi ng Geometers Sketchpad 5.0

Cc thao tc trn phn mm GSP tng t nh cc thao tc trn phn mm Office i vi cc

th thanh Menu cng nh cc nt thanh cng c, thanh cun

2.2 H THNG MENU:

a) Menu File:

New Sketch To bn v mi

OpenM bn v c sn

Sketchpad LessonLink Lin kt bn v

Save Lu bn v.

Save as Lu bn v vi tn khc

Closeng bn v ang m

Document Options Ty chn ca ti liu

Page setup Thit t trang in

Print Preview Xem trc trang in

Print In

Quit Thot

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b) Menu Edit: (hiu chnh)

Undo Phc hi thao tc va thi hnh

Redo Lm li

Cut Ct cc i tng ang c chn lu vo b nh

Copy Chp cc i tng ang c chn lu vo b nh

Paste Picture Dn cc i tng ang lu b nh

Clear Xo i tng c chn

Action Buttons To nt hot ng.

Select All Chn tt c cc i tng ang hin th

Select Parents Chn i tng cha

Select Children Chn i tng con

Split/Merge chia/gp cc i tng.

Edit Definition nh ngha li

PropertiesThuc tnh ca cc i tng

PreferencesThng s ca cc i tng

c) Menu Display:(Cch hin th)

Point Style: Kiu ca im

Line Style: Kiu ca ng

Color: Mu ca cc i tng

Text: vn bn

Hide Objects: n i tng

Show All Hidden: Hin tt c cc i tng n

Show Labels: Hin th tn

Label Objects t tn

Trace To vt cho i tng.

Erase traces: Xa vt ca i tng.

Animate Object: to chuyn ng cho i tng.

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Increase speed: tng tc chuyn ng

Decrease Speed: Gim tc chuyn ng.

Stop Animation: dng chuyn ng.

Show Text Palette: Hin thanh nh dng vn bn

Show Motion Control: Hin hp iu khin chuyn ng

Hide Toolbox: n hp cng c.

d) Menu Construct (Php dng hnh)

Point on Object: Ly im trn i tng

Midpoint: Ly trung im on thng

Intersection: Ly giao ca cc i tng

Segments: Dng on thng ni cc im

Rays: Dng na ng thng.(t 1 im n 1 im)

Lines: Dng ng thng.(qua 2 im)

Parallet Line: Dng ng thng song song vi 1 ng

thng v qua 1 im

Perpendicular Line: Dng ng thng vung gc 1

ng thng v qua 1 im

Angle Bisector: Dng phn gic ca gc to bi ba im

c th t.

Circle By Center + Point: Dng ng trn bit tm v

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qua 1 im

Circle By Center + Radius: Dng ng trn bit tm v

bn knh.

Arc on Circle: Dng cung trn ng trn

Arc through 3 Points: Dng cung trn qua 3 im.

Interior: T min trong hnh

Locus: to qu tch.

e) Menu Transform (Php bin hnh)

Mark Center: nh du tm

Mark Mirror: nh du trc i xng

Mark Angle: nh du gc quay

Mark Ratio: nh du t s

Mark vector: nh du vect tnh tin

Mark distance: nh du khong cch

Translate Php Tnh tin

RotatePhp quay

Dilate Php v t

Reflect: Php i xng

IteratePhp lp

f) Menu Measure (o lng)

Length: di on thng

Distance: Khong cch gia 2 im

Perimeter: Chu vi a gic

Circumference: Chu vi ng trn

Angle: s o gc to bi 3 im c th t.

Area: Din tch hnh trn, a gic, vin phn, qut.

Arc Angle: S o cung.

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Arc Length: di cung.

Radius: Bn knh

Ratio: T s

Value of Point: Gi tr ca im

Coordinates: Ta im.

Abcissa(x): Honh im

Ordinate(y): Tung im

Coordinate Distance: Khong cch gia 2 im theo h ta .

Slope: h s gc

Equation: Phng trnh

g) Menu Graph ( th)

Define Coordinate System: h trc ta nh sn

Mark Coordinate System: nh du h trc ta

Grid Form: Chn h li ta .

Show Grid: hin li ta .

Dotted Grid: im li ta

Snap Points: Bt dnh im vo li ta .

New Parameter To mt thng s mi.

New Function To biu thc ca mt hm s mi.

Plot New Function To biu thc v th ca mt hm

s mi.

Derivative: Tnh o hm ca hm s.

Tabulate: To bng gi tr.

Add Table Data Thm bng gi tr.

Remove Table Data Xo bng gi tr.

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h) Menu Window

Cascade: xp lp

Tile: xp ta

i) Menu Help

Learning Center

Welcome Videos

Using Sketchpad

Teaching with Sketchpad

Reference Center

Objects

Tools

Menus

Online Resource Center

Sample Sketches & Tools

Check for Updates

Technical Support

Picture Gallery

License Information

About Sketchpad

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2.3 H THNG CNG C:

Toolbox Tool Chc nng

Chn hoc ko i tng

Chn v quay i tng quanh 1 im chn lm tm

Chn v v t i tng quanh 1 im chn lm tm

V im

V ng trn (1im lm tm v 1 im trn ng trn)

V on thng qua 2 im

V tia t 1 im n 1 im

V ng thng qua 2 im

Min a gic (c t mu)

Hnh a gic (c t mu)

Bin a gic

Son vn bn

Bt v

Thng tin i tng

Cng c ngi dng to thm.

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PHN 3: BI TP THC HNH

3.1 BI TP C BN:

Bi tp Cch dng

Bi 1 : V ba im A, B, C khng thng hng, v on thng AB, v tia AC v v ng thng BC

Dng cng c dng 3 im.

Chn 3 im dng theo th t ri dng cng

c t tn

Dng cng c ni A vi B

Dng cng c ni B vi C

Dng cng c ni A vi C.

Bi 2 : V t gic ABCD, v ng trn (A, AC)

Dng cng c dng 4 im

Chn 4 im dng theo th t ri dng cng

c t tn

Dng cng c hay t hp phm Ctrl + L

ni cc nh to thnh t gic.

Dng cng c v ng trn tm A qua C

Bi 3 : V tam gic ABC, sau v ng cao AH, ng trung tuyn CD, ng phn gic BE ca gc ABC v ng trung trc ca cnh BC

Dng cng c dng 3 im, chn chng

theo th t, dng cng c t tn v

cng c s c tam gic ABC.

Chn im A v on BC vo menu Construct chn perpendicular line dng ng thng qua A v vung gc vi BC. Chn on BC vo menu Construct chn Intersection dng giao im H.

Chn ng vung gc, dng t hp phm Ctrl

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+ H n i.

Ni AH bng cng c

Chn on AB, dng t hp phm Ctrl + M dng trung im, ni CD.

Chn 3 im A, B, C theo th t , vo menu Construct chn Angle bisector dng tia phn gic gc B. dng giao im E, cho tia phn gic n i ri ni BE.

ng trung trc ngi c t lm.

Bi 4 : V hnh bnh hnh ABCD, v giao im O ca AC v BD, v ng trn (O, CD)

Dng 3 im A, B, C.

Chn 2 im B, C theo th t, vo menu Transform chn Mark vector to vect tnh tin.

Chn im A, vo menu Transform chn Translate, OK to im D l tnh tin ca A theo vect BC.

Ni cc nh c hnh bnh hnh, dng giao im O. (th thay i v tr cc im xem ABCD c cn l hnh bnh hnh?)

Chn im O v on CD, vo menu Construct chn Circle by center + radius dng ng trn (O; CD). (th thay i cc i tng trn hnh v).

Bi 5 : V tam gic nhn ABC ni tip ng trn tm O, v cc cung nh AB, AC v BC ca ng trn (O) vi nt m v mu cho cung AB, mu xanh cho cung AC, mu vng cho cung BC

Dng ng trn tm O (ch im sinh ra ng trn.)

Dng cng c dng 3 im trn ng trn, t tn v ni chng c tam gic ABC.

Cho n ng trn v im sinh.

Chn cc im O, A, B theo th t , vo menu Construct chn Arc on circle. Tng t

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cho cc cung BC, CA.

Thay i mu sc, d dy mng ca cc i tng bng cch right click vo i tng ri chn thuc tnh ph hp cho mi i tng.

Bi 6 : V ba im khng thng hng A, B, C. Sau , v cung trn ABC. Copy cung va dng ra v tr mi, t tn li l cung DEF ri t mu nh hnh v

Dng 3 im, t tn cho chng

Chn c 3 im, vo menu Construct chn Arc through 3 points dng cung trn.

Chn tt c cc i tng dng (Ctrl +A) dng lnh Copy; Paste dng cung mi ri i tn cc im mi thnh D, E, F

Chn cung ABC, dng t hp phm Ctrl + P dng hnh qut trn.

Chn cung DEF, vo menu Construct chn Arc interior chn Arc segment dng hnh vin phn.

C th ly cc gi tr o lng ca i tng bng cch chn i tng ri vo menu measure ly cc gi tr o lng.

Bi 7 : V ng trn (O) v im M ngoi ng trn . T M v cc tip tuyn MA, MB vi ng trn (O).

Dng ng trn tm O, ch im sinh.

Dng im M ngoi ng trn.

Dng on OM, trung im N ca on OM.

Dng ng trn tm N, bn knh NM; dng

cng c ni N vi M.

Dng cc giao im ca 2 ng trn (O), (N); chn 2 ng trn vo menu Construct chn Intersections.

t tn cho 2 giao im l A, B; ni MA; MB ri n cc i tng khng cn thit.

A

B

C

F

E

D

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Bi 8 : V tam gic ABC c nh A nm trn ng thng d song song vi BC. V vng trong tam gic ABC ri o din tch v chu vi tam gic ABC. Cho A di ng trn d thy din tch tam gic ABC lun khng i

Animate Point

Dng tam gic ABC

Dng im M bt k, chn im M v on BC, vo menu Construct chn Parallete line dng ng thng d qua M v song song vi BC.

Chn im A v ng thng d, vo menu edit chn meger point to parallete line bt dnh im A vo ng thng d.

Chn 3