Answer:
2
(
1
+
x
) (
1
−
x
) over x
^2
Step-by-step explanation:
if you didn't get that its 2
(
1
+
x
) (
1
−
x
) as the numerator and x
^2 as the denominator
In a square all 4 sides are equal, so when you cut it along the diagonal to make a triangle, both the base and the height of the triangle would be the same.
The area of a triangle is found by the formula 1/2 x base x height
Since the base and height are the same the formula becomes Area = 1/2 x S^2 ( where S is the length of a side).
The area is given as 0.72 square units.
Now you have 0.72 = 1/2 x S^2
First multiply both sides by 2:
1.44 = S^2
To find S, take the square root of both sides:
S = √1.44
S = 1.2
The side length is 1.2 units.
Multiply both sides by 19 to get w=171
This kind of triangle is acute triangle because on the given three angles, none of them does not exceed more than 90°.
The way you wrote the question was a bit confusing. Also, there are two variables here. To find the one variable (the number of rolls of wrapping paper) we need to find the number of packages.
