Let one of the two equal complementary angles be \(x\).
\(\therefore\) \(x + x = 90\degree\)
\(\Rightarrow\) \(2x = 90\degree\)
\(\Rightarrow\) \(x= \frac{90\degree}{2}= 45\degree\)
Thus, \(45\degree\) is equal to its complement.
Read more: Supplementary and Complementary Angles
Match the items given in Column I with one or more items of Column II.
Column I | Column II |
(a) A plane mirror | (i) Used as a magnifying glass. |
(b) A convex mirror | (ii) Can form image of objects spread over a large area. |
(c) A convex lens | (iii) Used by dentists to see enlarged image of teeth. |
(d) A concave mirror | (iv) The image is always inverted and magnified. |
(e) A concave lens | (v) The image is erect and of the same size as the object. |
- | (vi) The image is erect and smaller in size than the object. |