Question

1,2,3,4,5 va rog dau coroana și 40 de puncte

Answer 1

1.
A) a=90°
c=68°
B=180°-90°-68°=22°

B) a=35°
c=45°
B=180°-35°-45°=100°

C) a=b=c=>60°
180°:3=60°

D)a=c
A=35°
=>
A=C=35°
B=180°-35°-35°=110°

E)B=36°
C=54°

A=180°-36°-54°=99°

2. a) A=50°
B=70°
C=60°

A+B+C=180°
50+70+60=180
180=180. (adevărat)

b) A=50
B=49
C=71

50+49+71=180
170=180.(fals)

c)A=50
B=36
C=94

50+36+94=180
180=180 (adevărat)

d) 50+65+65=180
180=180(adevarat)

e) 50+90+40=180
180=180(adevarat)

f) 50+50+80=180
180=180 (adevărat)

3.m(ADB) =180°-65°-75°=40°
m(BDC)=180-110-30=40°

4. A=90°
B=C
180-90°=90°
90° : 2=45°

5. <A=180°-130°=50°
C=180-120=60
B=180-50-60=70°