12.2 - Surface Area of Pyramids 2016 · 2018. 9. 11. · 12.2 Surface Area of Pyramids 2016 May 11,...
Transcript of 12.2 - Surface Area of Pyramids 2016 · 2018. 9. 11. · 12.2 Surface Area of Pyramids 2016 May 11,...
12.2 Surface Area of Pyramids 2016 May 11, 2016Mental Floss Monday, May 9 th
Find the value of x. Express your answer in reduced radical form.
x12
12.2 Surface Area of Pyramids 2016 May 11, 2016
Polyhedron = 3D solid with many faces (polygons).
Examples of polyhedra:
1. Prism = Polyhedron with 2 parallel faces (bases) and identical crosssections between these faces.
2. Pyramid = Polyhedron with 1 base and that meets at a single, top point.
Surface Area of a Pyramid
1.) Base Area (BA) = Area of the 1 base
2.) Lateral Area (LA) = Area of all the faces sides not including the 1 base (triangles).
3.) Total Area (TA) = Base Area + Lateral Area
Regular Square PyramidKey Parts
Lateral Face:
Apothem of Base:
Altitude:
Slant Height:
Lateral Edge:
Example #1: Find the lateral area, base area, and total surface area of a regular square pyramid with base area of 100 and an altitude of 12.
Homework 12.2 p.567 #24,7