\( 16 \quad \) How long is an arc intercepted by the given central angle in a circle of radius 3.97 km ?

7. \( m \angle \mathrm{~A}=40^{\circ}, m \angle \mathrm{~B}=88^{\circ}, a=15 \) Find \( b \).

Examine the graph of the circle at right. Homework Help a. What is the equation of the circle? b. On graph paper, sketch the graph of \( x^{2}+y^{2}=81 \). What is the radius?

(c) \( \frac{3}{5} \) A circle its centre is the origin point and its radius length is 2 length units. Which of the following points lies on the circle?

find the center and radius of the circle \( x^{2}-2 x+y^{2}=3 \)

1 Verifica se i punti \( A(-1,3), B(-3,4) \), \( C(-9,6) \) sono allineati oppure no.