The best and most correct answer among the choices provided by your question is the third option or letter C. <span>Two adjacent, supplementary angles form a line.
Supplementary angles always have a sum of 180 degrees. Therefore, when these two angles are adjacent, they form a line, which has also an angle of 180 degrees.
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The square root of 45 is 6.70820393.
Answer:
x = 12
Step-by-step explanation:
The diagonals of a rectangle are congruent, thus
5x - 15 = 3x + 9 ( subtract 3x from both sides )
2x - 15 = 9 ( add 15 to both sides )
2x = 24 ( divide both sides by 2 )
x = 12
The answer is C.
40:20 is equal to 2:1