Mathematics
Grade9
Easy
Question
If a figure is rotated about 360°, it gives the initial polygon matrix called __.
- Zero matrix
- Identity matrix
- Scalar matrix
- Row matrix
Hint:
A rotation of 360° has no effect on it, and it will again come to same position.
The correct answer is: Identity matrix
A rotation of 360° returns the figure to its original position. Multiplying by the matrix that represents this rotation gives you the polygon matrix you started with, so it is called the identity matrix.
An identity matrix is having diagonal values a 1 and all other values as 0 .
