Mathematics
Grade 7
15 min
Distance/direction to starting point
Distance/direction to starting point
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1
Introduction & Learning Objectives
Learning Objectives
Identify and define a starting point in various movement scenarios.
Calculate the net change in position along a single axis (e.g., East-West or North-South).
Determine the straight-line distance required to return to the starting point after a series of movements.
Describe the correct direction needed to return to the starting point.
Represent movement paths and starting points on a simple coordinate grid or number line.
Solve multi-step problems involving distance and direction to a starting point.
Ever gotten a little lost in a new place and wondered how to get back to where you began? 🗺️ This lesson will teach you the math behind finding your way back!
You'll learn how to track movements, figure out your final position relative to your start, an...
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Key Concepts & Vocabulary
TermDefinitionExample
Starting PointThe initial position or location from which all movements begin. It's your 'home base'.If you start walking from your front door, your front door is the starting point.
MovementA change in position from one location to another, involving both distance and direction.Walking 5 meters North is a movement.
Net Change in PositionThe overall difference between your final position and your starting position, considering all movements. It's like summing up all the 'forwards' and 'backwards' or 'lefts' and 'rights'.If you walk 10 steps forward and then 3 steps backward, your net change is 7 steps forward.
Opposite DirectionsDirections that are exactly contrary to each other, often used to cancel out mov...
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Core Formulas
Calculating Net Movement in One Dimension
`Net Movement = (Total Movement in Positive Direction) - (Total Movement in Negative Direction)`
To find your overall change along a single line (like East-West or North-South), add up all movements in one direction and subtract all movements in the opposite direction.
Determining Direction to Return
If your `Net Movement` is in a certain direction (e.g., North), then the `Direction to Return` is the opposite direction (e.g., South).
Once you know your net position relative to the start, simply reverse that direction to find the path back.
Calculating Straight-Line Distance to Starting Point (for axial movements)
`Distance to Starting Point = |Net Movement|`
The distance you need to travel back is the absolute value of your n...
5 more steps in this tutorial
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Challenging
A park ranger walks a rectangular patrol route. She starts at the station, walks 3 km North, then 5 km East, then 3 km South. What is the final leg of her patrol to return directly to the station?
A.3 km North
B.5 km West
C.5 km East
D.8 km West
Challenging
A model train travels East at a constant speed. It travels for 10 seconds, then reverses West at the same speed for 4 seconds, then travels East again for 6 seconds. If its final position is 36 feet East of its start, what is its speed in feet per second?
A.3 feet per second
B.4 feet per second
C.6 feet per second
D.12 feet per second
Challenging
A hiker walks 'x' miles North, then twice that distance (2x) South, then 5 miles North. Her final position is 1 mile South of her starting point. What is the value of x?
A.3
B.4
C.5
D.6
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