Whiteboard Black & White [Copy]

Whiteboard Black & White [Copy]

Published on 2 November 2022
  • Facebook
  • Twitter
  • Linkedin
Д
Дарья Крестьянникова
Дарья 's Personal Gallery
Transcript
00:01
Формулы площадей
00:09
Треугольник
00:10
Трапеция
00:11
Параллелограмм
00:15
Треугольник
00:18
a
00:19
h
00:22
S=1/2*a*h
00:24
b
00:24
y
00:25
S=1/2*a*b*sin(y)
00:30
c
00:32
S=sqrt(p(p-a)(p-b)(p-c))
00:32
Формула Герона
00:32
p=(a+b+c)/2
00:38
R
00:40
S=(a*b*c)/4*R
00:46
r
00:47
S=p*r
00:47
p=(a+b+c)/2
00:53
b
00:53
a
00:56
S=1/2*a*b
01:02
a
01:02
a
01:02
a
01:04
S=((a^2)*sqrt(3))/4
01:08
Трапеция
01:10
a
01:10
b
01:11
h
01:12
S=((a+b)*h)/2
01:14
S=c*h
01:14
c
01:19
d1
01:19
d2
01:19
y
01:21
S=(d1*d2*sin(y))/2
01:25
Параллелограмм
01:28
a
01:28
h
01:29
S=a*h
01:31
b
01:31
y
01:32
S=a*b*sin(y)
01:39
A
01:39
B
01:39
D
01:39
C
01:39
M
01:39
N
01:39
K
01:39
L
01:39
A1
01:39
B1
01:39
D1
01:39
C1
01:43
ромб
01:43
прямоугольник
01:43
квадрат
01:45
O
01:45
O
01:45
O
01:50
AO=OC; BO=OD
01:51
AD||BC; AD=BC AB||CD; AB=CD
01:53
MK||KL; MK=KL ML||NK; ML=NK
01:53
MO=OK; NO=OL
01:53
A1B1 || D1C1; A1B1 = D1C1; A1D1 || B1C1; A1D1 = B1C1;
01:53
A1O=OC1; B1O=OD1