Answer:
7.2
Step-by-step explanation:
Answer:
a = 69
Step-by-step explanation:
The linear pair equals 180 degrees.
a + 90 + 21 = 180
a + 111 = 180
a = 69
nice!
Let r denote radius.
To find circumference we use

To find area we use

Hope this helps.
The second question is 48 !!
mark me brainliest please <3