Question

12 (A) Answer the following: (any four) (1) Observe the figure and answer the following questions : (i) Write the names of its diagonals. (ii) Write all the pairs of adjacent angles. (iii) Write all the pairs of opposite sides. ​

Answer 1

1. The diagonal from the top left corner to the bottom right corner of a square matrix is called the main diagonal or leading diagonal. The other diagonal from the top right to the bottom left corner is called antidiagonal or counterdiagonal. You can also define the main diagonal and antidiagonal of a rectangular matrix.
2. According to the figure,
3. There are 4 pairs of adjacent angles:
4. ∠AOD & ∠DOC
5. ∠AOD & ∠DOB
6. ∠DOC & ∠COB
7. ∠COB & ∠COA
8. There are 2 pairs of linear pair of angles
9. ∠ AOD and ∠DOB
10. ∠ AOC and ∠COB

Answer 2

Answer:

according to the fiqure, there are four adjacent