Acircle has a radius of 2 find the exact area of the circular region

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

Jacob signs up to work for 2 1/2 hours at the school carnival. if each work shift is 3/4 hour, how many shifts will jacob work? (i just want to double check : |, for anybody that responds! : )

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels