Complementary angle = \(90\degree\)- given angle
(i) Complement of \(20\degree = 90\degree - 20\degree = 70\degree\)
(ii) Complement of \(63\degree = 90\degree - 63\degree = 27\degree\)
(iii) Complement of \(57\degree = 90\degree - 57\degree = 33\degree\)
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. |