The length of each side is 28 cm.
the perimeter of the equilateral triangle is 48 cm. To find each side of the original triangle, you do 48/3=16cm. since the triangle dilate by 0.75, then you can just do 0.75*16=12cm. then you have to add 12 to 16 because the triangle gets bigger by 12 cm. so 16+12=28 cm.
Answer:
The unit vector in component form is
or
.
Step-by-step explanation:
Let be
, its unit vector is determined by following expression:

Where
is the norm of
, which is found by Pythagorean Theorem:


Then, the unit vector is:


The unit vector in component form is
or
.
X=117 degrees
Y = 63 degrees
Z = 117 degrees
Options in 3rd and 4th questions are wrong!. Hope it helps :)