1. Prisms Unit 12 Section 1 Identify the parts of prisms Find the lateral areas, total areas, and volumes of right prisms

2. bases lateral edges lateral face altitude Prisms bases: shaded faces – congruent polygons lying on parallel planes altitude: segment joining the two bases and perpendicular to both. The length of the altitude is called the height lateral faces: faces of a prism that are not to bases. Lateral faces are parallelograms lateral edges: intersections of lateral faces

3. Right prism: lateral faces are rectangles and lateral edges are altitudes Oblique prism: lateral faces are parallelogram but not rectangles and lateral edges are not altitudes Right rectangular prism Oblique hexagonal prism

4. Surface Area measured in square units Lateral area (LA): sum of the areas of the lateral faces. The lateral area of a right prism equals the perimeter of a base times the height of the prism. LA = ph Total area (TA): sum of the areas of all its faces. B equals the area of the base. TA = LA + 2B

5. measured in cubic units Volume Volume of a right prisms equals the area of a base times the height of the prism. V = Bh

6. Example 1 Refer to the diagram above and complete the chart. (p denotes the perimeter of the base.) 6 cm 4 cm 3 cm 2.8 cm pBLAV Rt. Rectangle prism Rt. Triangle prism Practice: Lesson 12.1 Notes Practice 1-3

7. Example 2 A cube has volume 8cm ². Complete each statement. a. The length of each edge of the cube is _________. b. The total area of the cube is __________. Practice: Lesson Notes 12.1 Practice 4 Additional Practice (If time): Lesson Notes Additional Example Homework: Practice Worksheet 12.1