The formula used to measure circumference of circle is
A. 2πr
B. πr² + 2r
C. πr²
D. πr²
Related Questions on Chapter 5: Mensuration Arc Length, Sector Area & Radian Measure - Math Mcqs for Grade 8
A. 51.28
B. 16.28
C. 46.28
D. 36.28
If the radius is 18 cm and the angle at center of circle is 120° then the area of sector is
A. 382.4 cm²
B. 339.3 cm²
C. 350 cm²
D. 300 cm²