we are given
Area is 1.89


now, we can use area formula


now, we can solve for c
we will get
.............Answer
The area for the perimeter of a rectangle is:
<em>P = 2l + 2w</em>
In this problem, we are given that
P = 155 and
l = 45.5. To solve for area, we must find w. To do this, plug in the given info and isolate the w like so:

Now we know
w = 32. Knowing all the necessary info, we can use the area formula, <em>A=lw</em>, to solve for A.

The area is
1,456 sq ft. Hope this helps!
Answer:
68º
Step-by-step explanation:
This is a quadrilateral and all degrees in every quadrilateral have to add up to 360º.
81º + 135º + 76º = 292º
360º - 292º = 68º
Therefore, x = 68º
71) The triangle is isos. so the base angles are congruent
2a+b=5b-3a
5a=4b
The angles of a triangle all add up to 180
180=5a -2b + 2a +b + 5b -3a
180=4a+4b
Substitute 4b with 5a
180=4a+5a
180=9a
a=20
And substitute a into the equation: 5a=4b to solve for b and solve for the measurements of the angles
72) Angles that are supplementary add up to 180
8(y-x)+124=180
9x-2y+124=180
8x-8y=56
(9x-2y=56)4
Use elimination to solve for the variables
8x-8y=56
-(36x-8y=224)
-28x=-168
x=48
Substitute x into the other equation to solve for y and find the measurements of the angles