What is the measure of central angle of the arc whose length is 11 cm and radius of the circle is 14 cm?
1). 45°
2). 60°
3). 75°
4). 90°
1. Find the volume of a regular tetrahedron with edge length of 6√2 cm.
3. If the area of a circle is A, radius of the circle is r and circumference of it is C, then
4. What is the altitude of an equilateral triangle whose side is 12√3 cm?
5. Find the area of the square, if it’s inscribed in a circle whose radius is 3 m.
9. The total surface area of a solid hemisphere is $108\pi$ sq.cm..The volume of the hemisphere is