B E D 24 a) how many triangular faces are there? b) how many edges are there? c) Draw a net that can be used to form the shape above.

A carpenter lays out boards of lengths 8 ft, 8 ft, 4 ft, and 4 ft by placing them end to end. a If these are joined at the ends to form a quadrilateral that has the 8-ft pieces connected in over, what type of quadrilateral is formed? b If these are joined at the ends to form a quadrilateral that has the 4-ft and 8-ft pieces alternating, what type of quadrilateral is formed?

Must two different points be collinear? Must three or more points be collinear? Can three or more points be collinear?

Consider the triangular prism shown in Exercise 2. a How many vertices does it have? b How many edges lateral edges plus base edges does it have? c How many faces lateral face plus bases does it have?