Answer:
54
Step-by-step explanation:
15/5 = 3 columns in each row are shaded. There are 18 rows, so 3×18 = 54 cells are shaded.
D. The greatest a can be is 9 and the greatest b can be is 4. a+b= 13 which is less than 20
1. Yes , Yes
2. Yes , Yes
3. No , No
4. No, Yes
Answer: 
Step-by-step explanation:
For convenience, I labeled some points as shown in the attached picture.
Also, I assume
and
are tangents to the circle.
(reflexive property)
(tangents drawn from a common external point are congruent)
(right angles are congruent)
Therefore, we know
by HL.
Thus, by CPCTC,

This means the measure of minor arc AC is
, and thus 