De termina el centro y el Radio de las siguientes arconferencias \( x^{2}+y^{2}+2 x+2 y-z=0 \)

3.) WHEA OF IS The ARE OF A SECTOR OF A CIRCLE RADIUS \( r=13 \mathrm{cM} \) IF the CORRESPONPING CENTRAL ANGLF IS \( 30^{\circ} \) ? 4.) WHAT IS TLE AREA OF A SEGTOR OF A CIRULE WHT DIAMETER \( D=28 \mathrm{cM} \) If the GENTRAL ANGLE IS \( 320^{\circ} \) ?

Exploration An object has a volume of 36 cubic inches. A box has side lengths 1 foot by 3 inches by 4 inches. a. What is the smallest number of these objects that can fit in the box? Explain your reasoning.

3. Construye angulos con las siguientes medidas, Luego, clasificalos según sus medidas. \( \begin{array}{lllll}\text { a. } 25^{\circ} & \text { b. } 85^{\circ} & \text { c. } 68^{\circ} & \text { d. } 150^{\circ} & \text { e. } 100^{\circ}\end{array} \)

9. Each face of a cube is a square with a side length of 8 centimeters. What is the total area of all of the faces of the cube?

Qual é a fórmula para calcular a área de um círculo?