2. Which of the following statements is FALSE about the circumference of a circle? \( C=\pi d \) \( C=\pi r^{2} \) The circumference of a circle describes the distance around the circle. The circumference of a circle is analogous to the perimeter of a polygon.

59. \( (0,4),(1,0) \) and \( (-1,-10) \) 62. \( (1,2),(-1,-6) \), and \( (2,-3) \)

4. (30\%) Sean \( A=(-3,2,0), B=(0,0,4), C=(2,1,-1) \) y \( P=(-3,4,0) \) a. Encuentre la ecuación del plano \( \pi(A, B, C) \) b. Determine la distancia entre el plano \( \pi(A, B, C) \) y el punto \( P \) c. Hallar el volumen del tetraedro \( A B C P \)

f. ¿Cuál es el perímetro de un semicirculo cuyo radio mide 12 cm ?

Triangles \( \triangle A O B \) and \( \triangle A O C \) have vertices \( A(0,7), B(-1,-2), C(2,-1) \), and \( O(0,0) \). Show that \( m \angle A O B>m \angle A O C \). Select the correct choice below and fill in the answer boxes within your choice. (Type an integer or decimal rounded to the nearest thousandth as needed.) A. Since \( A B=\square \) and \( A C=\square, \overline{A B}>\overline{A C} \), and thus \( m \angle A O B>m \angle A O C \). B. Since \( A B=\square \) and \( A C=\square, \overline{A B}=\overline{A C} \), and thus \( m \angle A O B>m \angle A O C \). C. Since \( A B=\square \) and \( A C=\square, \overline{A B}<\overline{A C} \), and thus \( m \angle A O B>m \angle A O C \).

If the diameter of a circle is doubled, how does it affect the circumference?