Coordinate Geometry
1. **Problem:** A fishing boat is at point A (3, 2) and a buoy is at point B (7, 5). Find how far east and north the boat must travel to reach the buoy.
2. **Formula and Explanation:** The eastward distance is the difference in x-coordinates, and the northward distance is the difference in y-coordinates.
3. **Calculation:**
- East distance = $7 - 3 = 4$ kilometers
- North distance = $5 - 2 = 3$ kilometers
4. **Answer:** The boat must travel 4 kilometers east and 3 kilometers north to reach the buoy.
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1. **Problem:** Find the quadrant of Navotas City Hall located at (-4, 6).
2. **Explanation:** Quadrants are defined as:
- Quadrant I: $x > 0, y > 0$
- Quadrant II: $x < 0, y > 0$
- Quadrant III: $x < 0, y < 0$
- Quadrant IV: $x > 0, y < 0$
3. **Observation:** Since $x = -4 < 0$ and $y = 6 > 0$, the point is in Quadrant II.
4. **Answer:** Navotas City Hall is in Quadrant II.
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1. **Problem:** Find the distance between two health centers P (1, 3) and Q (4, 7).
2. **Formula:** Distance between two points $(x_1, y_1)$ and $(x_2, y_2)$ is
$$d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$$
3. **Calculation:**
$$d = \sqrt{(4 - 1)^2 + (7 - 3)^2} = \sqrt{3^2 + 4^2} = \sqrt{9 + 16} = \sqrt{25} = 5$$ kilometers
4. **Answer:** The distance between the two health centers is 5 kilometers.
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1. **Problem:** Find the area of the triangular playground with lamp posts at (2, 1), (6, 1), and (2, 5), where 1 unit = 10 meters.
2. **Formula:** Area of a triangle with base $b$ and height $h$ is
$$\text{Area} = \frac{1}{2} b h$$
3. **Calculation:**
- Base length between (2,1) and (6,1) is $6 - 2 = 4$ units
- Height between (2,1) and (2,5) is $5 - 1 = 4$ units
- Convert units to meters: $4 \times 10 = 40$ meters
- Area in square meters:
$$\frac{1}{2} \times 40 \times 40 = \frac{1}{2} \times 1600 = 800$$ square meters
4. **Answer:** The area of the triangular playground is 800 square meters.
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1. **Problem:** Find the slope of the road between points (2, 4) and (6, 10).
2. **Formula:** Slope $m$ between two points $(x_1, y_1)$ and $(x_2, y_2)$ is
$$m = \frac{y_2 - y_1}{x_2 - x_1}$$
3. **Calculation:**
$$m = \frac{10 - 4}{6 - 2} = \frac{6}{4} = 1.5$$
4. **Answer:** The slope of the road is 1.5.