Answer:
9
Step-by-step explanation:
3/7 multiplied by 21 = 3/7 x 21 = 9 = 3/7 x 21/1 = 63/7 = 9
Or if you can't do the math - Think of a pizza with 21 slices . Now cut this pizza into 7 equal parts. You will find that each part contains exactly 3 slices. Now, eat 3 of these parts. With three slices in each part, you ate 9 slices - which is three sevenths of 21.
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
0.267 es la respuesta redondeada a la milésima más cercana
multiply -2/25 x 5 hours
-2/25 x 5/1 = -10/25 = -2/5
Answer:
x=42
y=59
Step-by-step explanation:
Ok so first things first
the angle that is equal to 2x-11 is vertical to the angle that is equal to 73
meaning that these angles are congruent
so we setup an equation
2x-11=73 and solve for x
step 1 add 11 to each side
73+11=84
-11+11 cancels out
now we have
84=2x
step 2 divide each side by 2
84/2=42
so x=42
so we know that the angles that are listed bellow
(73, 48 and y)
are supplements meaning that they will add up to equal 180 so to find y we subtract the given angles
180-73-48=59 so y=59
