Answer:

Step-by-step explanation:
In order for the triangle to be a right one we need every side to be of the same length. see the photo for furyher explanation.
Answer: 27
Explanation:
P = 2(l+w) = 2 · (9 + 4.5) = 27
CD is congruent to XY, DA is congruent to YZ and AC is congruent to ZX even tho i'm not able to see properly your image
By definition, the sine of an angle is given by:

Where,
C.O: opposite leg
h: hypotenuse
The hypotenuse is given by:

So, replacing values we have:

Rewriting we have:
Answer:
the sine value of this function is:
A)5 times square root 61 over 61