2. Which kind of number is 1r? 0 Rational number 0 Irrational number 0 Natural number 0 Integer 53675 3. What is correct notation forthe angle which is made from the rays and ? 0 All of the answer choices are correct. 4. If the circumference of a circle is divided into 360 equal parts, then the central angle corresponding to each one of these parts is equal to: 6. How many seconds are in a degree? 7. What does "length of an arc\" mean? 0 a part of an angle 0 a part of a square 0 a part of a circumference O a part of a triangle 8. What does "trigonometry\" mean? 0 measurement of time 0 measurement of angles 0 triangle measuring 0 All of the answer choices are correct