7. A curb-cut for wheel chairs must meet ADA (American with Disabilities Act) requirements.
Find the measure of 21 in the diagram below.
O168°
12°
O 178°
078⁰
78°
1
A
(1)

7 A curbcut for wheel chairs must meet ADA American with Disabilities Act requirements Find the measure of 21 in the diagram below O168 12 O 178 078 78 1 A 1 class=