Uchburchak medianalari uchun noto’g’ri tasdiqni ko’rsating:
A) Bir nuqtada kesishadi;
B) Kesishish nuqtasida 2:1 nisbatda bo’linadi;
C) Bir – biriga teng;
D) Har biri uchburchakni ikkita tengdosh qismga ajratadi.
sin=1/2 bo’lgan o’tkir burchakni ko’rsating.
A) 30; B) 45; C) 90; D) 60.
Agar va90<<180 bo’lsa, sin ni toping.
A) 12/13; B) 5/12; C) 5/13; D) /13.
Agar sin=3/5 va90<<180 bo’lsa, сos ni toping.
A) –4/5; B) 4/5; C) 3/4; D) –3/4.
Agar 90<<180 bo’lsa, quyidagilardan qaysi biri musbat?