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Lesson 7 Problem-Solving Practice
Distance on the Coordinate Plane
1. ARCHAEOLOGY An archaeologist at a
dig sets up a coordinate system using string.
Two similar artifacts are found—one at
position (1, 4) and the other at (5, 2). How
far apart were the two artifacts? Round to
the nearest tenth of a unit if necessary.
2. GARDENING Vega set up a coordinate
system with units of feet to locate the
position of the vegetables she planted in
her garden. She has a tomato plant at (1, 3)
and a pepper plant at (5, 6). How far apart
are the two plants? Round to the nearest
tenth if necessary.
3. CHESS April is an avid chess player. She
sets up a coordinate system on her chess
board so she can record the position of
the pieces during a game. In a recent
game, April noted that her king was at
(4, 2) at the same time that her opponent's
king was at (7, 8). How far apart were the
two kings? Round to the nearest tenth of
a unit if necessary.
4. MAPPING Cory makes a map of his
favorite park, using a coordinate system
with units of yards. The old oak tree is at
position (4, 8) and the granite boulder is at
position (–3, 7). How far apart are the old
oak tree and the granite boulder? Round to
the nearest tenth if necessary
5. TREASURE HUNTING Taro uses a
coordinate system with units of feet to keep
track of the locations of any objects he
finds with his metal detector. One lucky
day he found a ring at (5, 7) and an old coin
at (10, 19). How far apart were the ring and
coin before Taro found them? Round to the
nearest tenth if necessary.
6. GEOMETRY The coordinates of points A
and B are (–7, 5) and (4, –3), respectively.
What is the distance between the points,
rounded to the nearest tenth?
7. GEOMETRY The coordinates of points A,
B, and C are (5, 4), (–2, 1), and (4, –4),
respectively. Which point, B or C, is closer
to point A?
8. THEME PARK Bryce is looking at a map
of a theme park. The map is laid out in a
coordinate system. Bryce is at (2, 3). The
roller coaster is at (7, 8), and the water ride
is at (9, 1). Is Bryce closer to the roller
coaster or the water ride?
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