Step-by-step explanation:
<u>Substitute the value of x into the equation:</u>
<u>Multiply:</u>
<u>Add</u><u>:</u>
2(4x2)+2(1/2 4x3.5)+(4x2)
2(8)+2(1/2 14)+8
16+ 2(7)+8
16+14+8
38 sq. ft.
D & F
Step-by-step explanation:
D scale because all sides are different lengths
F obtuse because one angle is greater than 90 degrees
Look up definition of the other properties and you will see they don't apply
Y = 20x
y • x = 180
180/x = y
180/x = 20x
180 = 20x^2
x^2 = 6
x = + or - 3
Therefore y must equal + or - 60.