__________, primarily used for covering roofs of structures, acquire their strength from the fact that the sides of a triangle, once joined, cannot be forced out of shape

Muhammad's designated successor was which of the following?

A. Sunni B. Abraham C. Ali D. Muhammad left no designated successor.

What role do foundry experts provide?

a)  They make molds and do the casting. b)  They provide the found objects for mixed media works. c)  They make the armatures. d)  They make the work for the molds.