Step-by-step explanation:
AB + BC = AC
50° + BC = 180°
BC = 180° - 50°
BC = 130°
AB = 50°
BC = 130°
AC = 180°
Answer:
It can be 23 or 823
Step-by-step explanation:
Depends because if you divide 138 and 6 you'll get 23.
If you multiply 138 times 6 you'll get 823
Answer:
1:3
Step-by-step explanation:
15/15 = 1 and 45/15 = 3
Answer:
- area ≈ 176.7 cm²
- circumference ≈ 47.1 cm
Step-by-step explanation:
The radius is half the diameter, so is ...
r = d/2 = 15 cm/2 = 7.5 cm
The area formula is ...
A = πr²
Filling in the radius, we have ...
A = π·(7.5 cm)² = 56.25π cm² ≈ 176.7 cm² . . . area
__
The circumference formula is ...
C = πd
Filling in the diameter, we have ...
C = π·(15 cm) = 15π cm ≈ 47.1 cm . . . circumference
