Brent created a mural, 4/5 of which he painted in shades of blue. Three eighths of the blue area is sky blue. What portion of th
1 answer:
Answer: of the mural is sky blue.
Step-by-step explanation:
Let x be the full portion of mural.
Since, of mural is painted in shades of blue.
Therefore, the blue portion=
Also, Three eighths of the blue area is sky blue.
Therefore, the portion of the mural is sky blue=
The portion of the mural is sky blue=
Simplify, by dividing numerator and denominator by 4, we get
The portion of the mural is sky blue=
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Given
Area of the regular pentagon is 6.9 cm².
Find out the perimeter of a regular pentagon
To proof
Formula
Area of regular pentagon is
As given in the question
area of regular pentagon = 6.9 cm²
now equating the area value with the area formula.
Now put
√5 = 2.24 ( approx)
put in the above equation
thus
a² = 4.01
a = √ 4.01
a = 2.0 cm ( approx)
As perimeter represented the sum of all sides.
i.e regular pentagon have five sides of equal length.
Thus
perimeter of the regular pentagon = 5 × side length
= 5 ×2.00
therefore the perimeter of the regular pentagon = 10cm
option c is correct
Hence proved