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Площадь треугольника 8 класс PowerPoint PPT Presentation


Площадь треугольника 8 класс

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Площадь треугольника 8 класс

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8


8

, .


8

.

S1

S2

H

F

F = H S1 = S2


8

,

.

S2

S3

S1

S4

S = S1 + S2 + S3 + S4


8

.

a

a


8

a

b-

b

a


8

a

h -

h

a


8

a

h -

h

a


8

, .

.


8

1

2

5

12

7

S=49

S=60


8

3

4

10

h

4

S=60

11

S=44

h=6


8

5

h

6

18

30

S=180

h=10


8

6

14

h

8,1

h=7

S=56,7


8

7

3

4

8

12


8

7

3

24

9

8

36

4


8

8

3

9

3

3

4

80

8

3

6

2

10


8

9

5

10

5

10


8

, .


8

B

a

h -

h

a

A

C


8

B

D

:

h

a

A

C


8

a

b

-

c

b

a


8

10

11

6

4

11

8

S=24

S=22


8

12

13

4

4

3

10

S=20

S=6


8

, .

5

10

5

10


8

3

4

8

5

4

6


8

14

, 8 10 .

A

D


8

d1, d2


8

h

a

a

a

h -

b

a,b -

d1, d2


8

, .

.


8

, .

A


8

1

2

1 S= 16

1 S= 35

2 S= 60

2 S= 44

3 S= 21

3 S= 20


8

, .

A


8

  • :

  • .52 ;

  • 468(,), 471, 476;

  • .


8


8

, .

!


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