3-D shapes: Similar and different between a prism and a pyramid.

23 -) Determine o valor de \( x \) dos Triangulos

6. Consulta y escribe las formulas para hallar el número de diagonales de un poligono y la fórmula para hallar la suma de los ángulos interiores de un poligono. Luego, hallar el número de diagonales y suma de los ángulos interiores del: \( \begin{array}{llll}\text { a. Octágono } & \text { b. Hexágono } & \text { C. Dodecágono } & \text { d. Eneágono }\end{array} \)

4. Identify each of the following as an ellipse, circle, or hyperbola. Show how you determined it. a) \( x^{2}-2 x-4 y^{2}-16 y=19 \) answer: b) \( 2 y^{2}-6 y+2 x^{2}+36 x-45=0 \) answer: c) \( x^{2}+9 y^{2}+36 y-45=0 \) answer:

A farmer buys 58 feet of fencing material to build a rectangular livestock pen. Fill in the second columi of the table to find the length of the pen if the width is \( 4,6,8,10 \), or 12 feet. Then find the area of each of the pens formed.

6. Jennifer wants to plant a flower garden in the space shown. She wants to add a fountain that is 3 feet wide and 3 feet long. What is the area of the space left to plant flowers?