Answer:
4
Step-by-step explanation:
<em>When rotating a point 90 degrees counterclockwise about the origin the point A(x,y) becomes A'(-y,x). </em>
Point C has coordinates of (4, 3)
New coordinates will be C'(-3, 4)
<u>So the answer is:</u>
y-coordinate of C' is 4
Answer:
y=5
Step-by-step explanation:
80-10y= 10y+5-5y
80-5=20y-5y
75=15y
5=y
Answer:
The area of the regular pentagon is 
Step-by-step explanation:
we know that
The area of a regular polygon is equal to

where
P is the perimeter of the regular polygon
a is the apothem
Find the perimeter P
----> the regular pentagon has five equal sides
---> distance from center to middle of side
substitute


Answer:
14.6 units
Step-by-step explanation:
AB = 
AB =
BC = 
CD = 
DA = 
Primeter = 