20 units
Perimeter =add up all sides.
Perimeter = 5+1+5+9
=20 units
Answer:

Step-by-step explanation:
Given:

Then the composition of functions:

where we have written the final functional expression in its standard form.
Answer:
for 7 fabric (square meters), he can make 2 cloaks. for 4 cloaks, he needs 14 fabric (square meters).
So hmmm check the picture below
in an isosceles triangle, two sides are equal, and thus the angles those twin legs make, are also twin angles
let's say the angle made is "a", so all internal angles will be 64 + a + a = 180
or 64 + 2a = 180
thus 2a = 180 - 64 => 2a = 116, thus a = 116/2