Answer:
<h2>
XN = 6</h2>
Step-by-step explanation:
If XY is bisector of angle AXN then: 
4x = 2π when x = π/2
The period is π/2.
21,618.........................
Answer:
h = 13 units²
Step-by-step explanation:
The way to find the area of a parallelogram is to multiply the length of one side (21) and multiply it by the height:
A = l*h
We know the area and the length:
273 = 21*h
Now we solve for height.
273/21 = (21*h)/21
273/21 = h
273/21 = 13
h = 13 units²