Question

Punita wants to classify a triangle according to the given clue.
Two angles of the triangle are complementary.
What type of triangle is the one Punita wants to classify?

• A. Right, because complementary angles add up to $90$ and the difference between $180$ and $90$ is $90$
• B. Obtuse, because complementary angles add up to $45$ and the difference between $180$ and $45$ is $135$
• C. Equiangular, because each of the two complementary angles is equal to $60$ and the difference between $180$
  and 120 is 60
• D. Acute, because complementary angles add up to $100$ and the difference between $180$ and $100$ is $80$

Answer 1

The correct option is A Right, because complementary angles add up to $90$ and the difference between $180$ and $90$ is $90$

Two angles are Complementary when they add up to 90 degrees.so, third angle will be 90.
So, it will be right angle triangle.So Punita wants to classify
(A) Right, because complementary angles add up to 90 and the difference between 180 and 90 is 90.