Tiet 16 Goc hhoc 6

8/2/2019 Tiet 16 Goc hhoc 6

1/17

pd f Machine

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2/17

1. Gc:

O

y+ Gc chung O: l nh.

+ Hai tia Ox, Oy:l hai cnh.

B

* /n: Gc l hnh gm hai tia chung gc.

x

+ c : g c x y oc g c y xhoc gc O

+ K hiu: xOy,

* Nu A Ox, B Oy th gc xOy cn - c gi lgc AOB hoc gc BOA.

A

, , xOy yOx O Hoc

hoc yOx, hoc O

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3/17

Bi tp: Hnh no c gc trong cc hnh v sau?V sao? Nu c gc hy c tn gc, ch r nh,

cnh ca gc.

b BA

P

Gc aObGc aObnh: Onh: OCnh: Oa, ObCnh: Oa, Ob

Hai tia Ax,Hai tia Ax,By khngBy khngto thnhto thnhgc.gc.

Gc PMQGc PMQ

nh: Mnh: MCnh: MP,Cnh: MP,MQMQ

Gc xOyGc xOy

nh: Onh: OCnh Ox ,Cnh Ox ,OyOy

O a

x y

MO yx

H.a H.b H.c H.d

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4/17

2. Gc bt:

Ox y

* /n: Gc bt l gc c hai cnh l hai tia i

nhau.

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5/17

Bi tp 6 (Sgk - Tr 75):

in vo ch trng trong cc pht biu sau.a) Hnh gm hai tia chung gc Oxv Oy l .im O lgc xOy nh

................... ................

a t a x v yb) Gc RST c nh l .C haicnh lc) Gc bt l

a cn c a g cS

SR v ST

gc c hai cnh l hai tia inhau

.....................................

.......................

.....................................................

......

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6/17

3. V gc:

* Cch v:

+ V hai cnh.

+ V nh.

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7/17

y

3. V gc:3. V gc:

.xO

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8/17

Hot ng nhm:

-V mt gc bt k.

- t tn cho gc .

- Vit tn nh ca gc.

- Vit tn cc cnh ca gc.

- c tn gc.

- Vit k hiu gc.

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9/17

O

x

t

1

2

y

C 3 gc: O , O , yOt1 2

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10/17

4. im nm trong gc:

O x

y

M

O t

y

A

NHai tia Ox v Oy khng i nhau.Hai tia Ox v Oy khng i nhau. im M nmim M nmtrong gc xOy khi tia OM nm gitrong gc xOy khi tia OM nm gia hai tia Ox, Oya hai tia Ox, Oy..Tia OM nm trong gc xOyTia OM nm trong gc xOy..

Bi9:Bi9:Hai tia Oy v Oz khng i nhau.Hai tia Oy v Oz khng i nhau. im A nmim A nmtrong gc zOy nu tia OA nm gitrong gc zOy nu tia OA nm gia hai tiaa hai tia ................Oy v Ozpd f Machine



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11/17

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12/17

Bi 1: Cho tr- c mt gc nh- hnh v:

A x

y

Cch vit k hiu ca gc ny l:

D. C ba cch vit trn u ng

A. xyA B. Axy C. xAy

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13/17

Bi 2: Xc nh cu ng sai trong cc phtbiu sau

1) Gc RST c nh l R, c hai cnh l RS v RT.

2) Gc RST c nh l S, c hai cnh l RS v ST.

3) Gc RST c nh l S, c hai cnh l SR v ST.

1) Sai 3) ng2) Sai

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14/17

Bi 3: Cho hnh v sau:

y

x

m

n

SR

P

Q

O

I

Cho hai gc xOy v mIn c

cc cnh ct nhau nh- hnhv. Th th:

A. im P nm trong gc xOy

B. im S nm trong gc OQm

C. im S nm trong gc xQm

D. im R nm trong gc mIn

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15/17

A

B C

Bi 4: Cho hnh v sau:

Trn hnh c bao nhiu gc?

c tn cc gc ?

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16/17

Ghi nh

1) Gc l hnh gm hai tia chung gc.Gc chung ca hai tia l nh ca gc. Hai tia

l hai cnhca gc.

c g c c a cn a anhau.

3) Khi hai tia Ox v Oy khng i nhau, im Ml im nm bn trong gc xOy nu tia OM nmgia Ox v Oy.

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17/17

H- ng dn v nh

1)Hc ghi nh.

2)Luyn tp v gc, t tn, vit k hiu gc.

3)Bi tp v nh: 7,8,9,10(SGK Tr75)

c r- c o g c .

5)Chun b: Th- c thng, th- c o gc chobi S o gc.

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Tiet 16 Goc hhoc 6