The sum of the interior angles of a triangle is 180 degrees.
1.) Translating the problem into equation:
7:11:12 = 180 degrees
7x+11x+12x = 180 degrees; Where x = missing number
30x = 180
30x/30 = 180/30 divide both sides by 30
x = 6
2.) Substitute the values:
7x+11x+12x = 180
7(6)+11(6)+12(6) = 180
42+66+72 = 180
180 = 180
3.) Therefore, the angles should be 42 degrees, 66 degrees and 72 degrees.
4.) See attached drawing of triangle
Given
formula for the perimeter of a rectangle = 2 ( l + w)
where l represents the length and w represents the width.
What does the 2 represent in this formula
To proof
As given in the question
Formula for the perimeter of a rectangle = 2 ( l + w)
where l = length , w = width
Perimeter of a rectangle is equal to the sum lengths of all the four sides.
Rectangle consisted of four sides.
Rectangle opposite sides are of equal length.
The diagram of rectangle given below.
option (D) is correct.
Therefore 2 represents the two sets of length and width pairs.
Hence proved
If we take 9.2 to be the 100%, what is 43.7 off of it in percentage then?
X/4 = x/20 + 1
Multiply through by 20, to get
5x = x + 20
5x - x = 20
4x = 20
x = 20/4 = 5
x = 5
The sum of 14 and 3 is equal to 17