Answer:
A scaled copy is a copy of an figure where <u>every</u> length in the original figure is multiplied by the same number.
The original figure A is 2 units wide and 2 units high. The scaled copies must follow the same ratio of width to height (2 : 2), as well as the vertices of the figure remaining the same.
Therefore, figures 2 and 4 are scaled copies only.
No, for figure B to be a scaled copy, the width would also have to be scaled down. As the width has remained the same in both figures, figure B is not a scaled copy.
A & D are scaled copies
<u>Question 4</u>
1. 5 · 3 = 15
2. 4 · 8 = 32
3. 6 · = 9
4. 12 · = 3
A matrix is diagonal if
In other words, you want non-zero elements only when the indices of the row and the column are the same: the first element of the first row must be non zero, the second element of the second row must be non-zero, and so on. All other elements must be zero.