Medium
Which of the following statement is true?
Explanation
Explanation
A linear pair of angles must add up to exactly 180 degrees. Two right angles (90 + 90 = 180) satisfy this exactly. Two acute angles (each less than 90) would add to less than 180, and two obtuse angles (each more than 90) would add to more than 180, so only the right-angle pair works.
PRO TIP
Re-check your working by substituting the answer back into the original question.