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Question
is rectangle efgh the result of a dilation of rectangle abcd with a center of dilation at the origin? why or why not? no, because corresponding sides have different slopes. no, because the center of dilation is not at (0, 0). yes, because corresponding sides are parallel and have lengths in the ratio \\(\frac{4}{3}\\). yes, because both figures are rectangles and all rectangles are similar.
- Analyze the first option: In rectangles, sides are either horizontal (slope 0) or vertical (undefined slope). Corresponding sides of ABCD and EFGH should have the same slopes (horizontal/vertical), so this option is wrong.
- Analyze the second option: The center of dilation is given as the origin, so this reason is incorrect.
- Analyze the third option: For dilation, corresponding sides should be parallel (which they are, as both are rectangles with horizontal/vertical sides) and the ratio of lengths should be constant. Let's check lengths: Suppose ABCD has length, say, from x=-3 to x=3? Wait, looking at the grid: Let's find coordinates. Let's assume ABCD: D(-3,0), C(3,0)? Wait no, looking at the grid, D is at (-3,0)? Wait the grid has D at -4? Wait no, the x-axis: H is at -4, D at -3? Wait maybe better to count units. Let's say ABCD: length (horizontal) from, say, x=-3 to x=3? No, looking at the figure, ABCD is inside EFGH. Let's take EFGH: E(-4,4), F(4,4), G(4,0), H(-4,0). So length of EF is 8 (from -4 to 4 on x-axis, y=4), height EH is 4 (from y=0 to y=4, x=-4). ABCD: Let's say A(-3,4)? No, wait ABCD is the inner rectangle. Let's say A(-3,2)? No, maybe coordinates: Let's see D is at (-3,0), C(3,0), B(3,2), A(-3,2). So length of AB (and CD) is 6 (from -3 to 3), height AD (and BC) is 2. Wait no, maybe I'm miscalculating. Wait EFGH: from x=-4 to x=4 (length 8), y=0 to y=4 (height 4). ABCD: from x=-3 to x=3 (length 6), y=0 to y=2 (height 2). So ratio of lengths: 8/6 = 4/3, ratio of heights: 4/2 = 2. Wait that's not same. Wait no, maybe my coordinate assumption is wrong. Wait the inner rectangle ABCD: let's see, D is at (-3,0), C(3,0)? No, the grid lines: each square is 1 unit. So EFGH: E(-4,4), F(4,4), G(4,0), H(-4,0). So length EF: 4 - (-4) = 8 units (horizontal). Height EH: 4 - 0 = 4 units (vertical). ABCD: Let's say A(-3,2), B(3,2), C(3,0), D(-3,0). Then length AB: 3 - (-3) = 6 units. Height AD: 2 - 0 = 2 units. Now ratio of EF to AB: 8/6 = 4/3. Ratio of EH to AD: 4/2 = 2. Wait that's not same. Wait maybe I got the inner rectangle wrong. Wait maybe ABCD is from x=-2 to x=2? No, the grid has C at 3? Wait the x-axis: the tick marks are at -4, -2, 0, 2, 4. So maybe each grid square is 1 unit. So EFGH: from x=-4 to x=4 (8 units), y=0 to y=4 (4 units). ABCD: from x=-3 to x=3? No, x=-3 to x=3 is 6 units, y=0 to y=2? No, y=0 to y=4? No, the inner rectangle is lighter. Wait maybe ABCD has length 6 (from -3 to 3) and height 2 (from 0 to 2), EFGH has length 8 (from -4 to 4) and height 4 (from 0 to 4). Then ratio of length: 8/6 = 4/3, ratio of height: 4/2 = 2. Wait that's inconsistent. Wait maybe I made a mistake. Wait no, dilation requires that the ratio of all corresponding linear measurements is the same (scale factor). So maybe the inner rectangle is from x=-3 to x=3 (length 6) and y=0 to y=3? No, the figure shows the inner rectangle's top at y=2? Wait the grid has y-axis with 4, 2, 0, -2, -4. So EFGH's top is at y=4, bottom at y=0. The inner rectangle (ABCD) has top at y=2, bottom at y=0. So height of EFGH: 4 - 0 = 4, height of ABCD: 2 - 0 = 2. Ratio 4/2 = 2. Length of EFGH: from x=-4 to x=4: 8 units. Length of ABCD: from x=-3 to x=3: 6 units? Wait no, x=-3 to x=3 is 6, but x=-4 to x=4 is 8. 8/6 = 4/3 ≈1.333, but height ratio is 2. That can't be. Wait maybe the inner rectangle is from x=-2 to x=2 (length 4) and y=0 to y=2 (height 2). Then EFGH length 8, height 4. Ratio 8/4 = 2, 4/2 = 2. Ah, that makes sense. Maybe I misread the inner rectangle's x-coordinates. So if ABCD is from x=-2 to x=2 (length 4) and y=0 to y=2 (height 2), EFGH…
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Yes, because corresponding sides are parallel and have lengths in the ratio $\frac{4}{3}$. (The third option: "Yes, because corresponding sides are parallel and have lengths in the ratio $\frac{4}{3}$".)