Ուղղանկյուն եռանկյուններ

Տեսական մասը կրկնեք այստեղ․

1) C = 90
B = 60
BA = 10
90 + 60 = 150
180 – 150 = 30
A = 30
10 : 2 = 5
BC = 5

2) C = 90
90 : 2 = 45
B = 45
D = 90
A = 45
C/2 = A = 45
CD = AD = 8
AB = 2 • 8 = 16

3)AE = 26
EC = ?
A = 30
E = 60
C = 90
60 + 90 = 150
180 – 150 = 30
<EBC = 30
AE = BE = 26
26 : 2 = 13

4) C = 90
CD = 3,5
BC = CD
A = 30
AB = AD = 7
BD = 7
BC = CD
30 + 90 = 120
180 – 120 = 60
B = 60
D = 60

5)C = 90
BE = 9
<P = 180 – 150 = 30
<PBC = 60
90 – 60 = 30
<CBE = 30
9 : 2 = 4,5
CE = 4,5
PE = 9 • 2 = 18
18 – 4,5 = 13,5

6) C = 90
AA1 = 20
B = 30
CAB = 60
60 : 2 = 30
CA = 20 : 2 = 10