The radius, r, of the base of a right circular cone is 2 cm, and its slant height, l, is 12 cm. What is the surface area of the cone?

Pepe is going to spin the following spinner 800 times. the spinner is divided into equal sections.a. exactly 160 timesb. clost to 160 times but probably not exactly 160 timesc. exactly 640 timesd. close to 640 times but not probably not exactly 640 times. me

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.