Answer:
3
Step-by-step explanation:
Never
perfect squre trinomial is in form
(a+b)(a+b) or (a-b)(a-b)
that is not equal to (a+b)(a-b)
never
Answer:
Part 1) 
Part 2) 
Part 3) 
Step-by-step explanation:
see the attached figure with letters to better understand the problem
step 1
In the right triangle ABC
we know that
The triangle ABC is a 
so
Is an isosceles right triangle
The legs are equal
therefore
AC=AB

step 2
Find the length side BC
Applying the Pythagorean Theorem]



step 3
Find the value of y
In the right triangle BCD
----> by SOH (opposite side divided by the hypotenuse)

Remember that

so

step 4
Find the value of z
In the right triangle BCD
----> by CAH (adjacent side divided by the hypotenuse)

Remember that

so

Answer:
22
Step-by-step explanation:
the first three set of dots are 11
if you combine them
they'll look like the last one
11 + 11
=22
To find the shaded area in an image first calculate the total area of the figure and then subtract the white area from this total.
<h3>How to find the area of a shaded area?</h3>
- Determine the total area of the figure, in this case, the are of the rectangle that contains the triangle and the semicircle.
- Calculate the area of the white region.
- Substract the non-shaded area to the total area.
<h3>How to find out the area of different shapes?</h3>
- Rectangle: side x side = 2 x 4 = 8 square feet
- Isosceles triangle = 1/2 base x height
- Semicirle = 1/2 (π x r^2)
Note: This question is incomplete because the image of the shaded regions is not provided; due to this, the answer is based on general knowledge.
Learn more about triangles in: brainly.com/question/2773823