1.) What angle in radians is subtended by an arc 1.30 m in length on the…

1.) What angle in radians is subtended by an arc 1.30 m in
length on the circumference of a circle of radius 2.50 m ? What is
this angle in degrees?
2.) An arc 12.0 cm in length on the circumference of a circle
subtends an angle of 114 ? . What is the radius of the circle?
3.) The angle between two radii of a circle with radius 1.90 m
is 0.650 rad . What length of arc is intercepted on the
circumference of the circle by the two radii? ? = m