71.7k views
20 votes
*image is attached above*

*image is attached above*-example-1

1 Answer

8 votes

Answer:

a = 16

Explanation:

The altitude YB is at right angles to the base XZ , then

∠ YBZ = 90° , so

6a - 6 = 90 ( add 6 to both sides )

6a = 96 ( divide both sides by 6 )

a = 16

User Joane
by
3.6k points