Решить всё заданияРасписывать полностьюТолько сегодня (14.05), можно 15.05 до 8 утраДаю 100 Поинтов

1.

A = C = 60

B = D = 120

2.

CDE = COE = 86

3.

P = 12+ 14 + 18 =44 cm

AB =12cm BC = 14cm AC = 18cm

MK = 1/2AC

MK = 18/2 = 9 cm

4.

S = ab

a : b = 3 : 4

182 = 3x*4x

12 = 182

= 15,2

x = 3.9

a = 3 * 3.9 = 11.7

b = 4 * 3.9 = 15.6

5.

a = b = 10 cm

c = 12cm

h - ?

th Pivagor

=

= 100 + 36

h =

h = 11.6

S = 1/2*c*h

S = 6*11.6 = 69.6

6.

c = 90*

AB = 12

BC = 6

a = 60*

b = 90-60 = 30*

7.

BC = 13

AD = 37

BC = AB

h =

h =

h =

h = 17.6

S = a+b/2*h

S = 13+37/2*17.6

S = 440 cm