На рисунке \( 60 O A=O D, O B=O C \), те, что треугольники \( A O B \) и \( D O C \) равны; б) найдите угол \( A C D \), м Отрезки \( A C \) и \( B D \) точкой пересечения делятся пополам. До- кажите, что \( \triangle A B C=\triangle C D A \).

(Geometry, Unit 1, Lesson 20) a. Describe a transformation that could be used to show that corresponding angles are congruent. Type your response in the space below. B I Type here

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.

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?

62 in raggio di una circonferenza misura 6 cm . Cal- cola la lunghezza dell'arco corrispondente a un angolo al centro di \( 45^{\circ} \). \( [1,5 \pi \mathrm{~cm}] \)