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7.02 Distances in the plane using the Pythagorean theorem

Worksheet
Distance between two points
1

Consider point P plotted on the coordinate plane:

If the coordinates of P is at \left( - 15 , 8\right), find the distance of P from the origin.

-15
-12
-9
-6
-3
x
-2
2
4
6
8
10
y
2

The points P\left( - 3 , - 2 \right), Q\left( - 3 , - 4 \right) and R\left(1, - 4 \right) are the vertices of a right triangle, as shown on the coordinate plane:

Find the length of the following segments, correct to three decimal places where necessary:

a

\overline{PQ}

b

\overline{QR}

c

\overline{PR}

-5
-4
-3
-2
-1
1
2
3
4
5
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
3

Consider the following triangle on the coordinate plane:

Use the Pythagorean theorem to find the exact length of \overline{AC}.

-1
1
2
3
4
5
6
7
8
9
x
-9
-8
-7
-6
-5
-4
-3
-2
-1
1
y
4

Consider \overline{AB} that has been graphed on the coordinate plane:

a

Find the vertical component of the distance from A to B.

b

Find the horizontal component of the distance from A to B.

c

Use the Pythagorean theorem to find the exact length of \overline{AB}.

-5
-4
-3
-2
-1
1
2
3
4
5
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
5

Consider \overline{AB} that has been graphed on the coordinate plane:

a

Find the vertical component of the distance from A to B.

b

Find the horizontal component of the distance from A to B.

c

Use the Pythagorean theorem to find the exact length of \overline{AB}.

-5
-4
-3
-2
-1
1
2
3
4
5
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
6

Consider \overline{AB} that has been graphed on the coordinate plane:

Find the exact length of \overline{AB}.

-5
-4
-3
-2
-1
1
2
3
4
5
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
7

Find the length of \overline{AB} shown on the graph. Round your answer to two decimal places.

-6
-5
-4
-3
-2
-1
1
2
3
4
x
-5
-4
-3
-2
-1
1
2
3
4
5
y
8

Find the exact distance from A \left(-1, - \dfrac{3}{5} \right) to B \left(4, \dfrac{12}{5}\right).

9

Consider the segment joining points P\left(16, - 10 \right) and Q\left(4, 6\right):

a

Find the length of \overline{PQ}.

b

Point N is the midpoint of \overline{PQ}. Find the distance from P to N.

-2
2
4
6
8
10
12
14
16
x
-12
-10
-8
-6
-4
-2
2
4
6
8
y
10

Which point is farther from P \left(5, - 1 \right): M \left(10, - 6 \right) or N \left(1, 2\right)?

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Outcomes

MA.8.GR.1.2

Apply the Pythagorean Theorem to solve mathematical and real-world problems involving the distance between two points in a coordinate plane.

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