1. Spring 2013 Day 2

2. Warm-Up Find the slant height of the pyramid. Find the lateral area
Find the surface area

3. Homework Check A, C, D 5. C 6. D 7. B 8. A 9. B, C
4. Hexagonal prism 5. LA=120, SA=220
6. LA=96, SA= pi
pi pi
11. LA=11.7pi LA=75.25pi 75.3pi
16. height=20

4. Tetrahedron – the net makes 4 equilateral triangles.
Find the surface area of a tetrahedron that has an edge of 8 inches.

5. Sphere
The set of all points in space equidistant from a given point (the center)

7. Great Circle
The largest cross section of a sphere; shares the same radius and center as the sphere Ex: The Earth’s equator

8. Ex 1: Given the diameter or radius, find the SA and V of each sphere
a. r= b. d=12

9. Ex 2: Given the circumference of the great circle of the sphere, find the radius and Surface Area
a. C=36pi b. C=52pi

10. Ex 3: Given the surface area of the sphere, find the Volume:
a. SA = 845 in sq. B. SA=144pi m sq

11. Ex 4: Given the volume of the sphere, find the surface area
a. V=288pi ft cubed b cm cubed

12. Classwork – due by the end of class
Worksheet on spheres
HW:Complete worksheet on lateral area and surface area of pyramids and cones