1) 
2)
is a right angle (perpendicular lines form right angles)
3)
is a right triangle (definition of a right triangle)
4)
and
are complementary (the acute angles of a right triangle are complementary)
Answer:
Step-by-step explanation:
D
try .01
Step-by-step explanation:
The answer should be x = 6
Answer:
A
Step-by-step explanation: