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tahiratnoel20
08.03.2021 •
Mathematics
XYZ has coordinates X(2, 3), Y(1,4), and Z(8,9). A translation maps X to X'(4,7). What are the coordinates for Y' and Z' for this translation?
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Ответ:
The coordinates are
and
.
Step-by-step explanation:
First, we have to derive an expression for translation under the assumption that each point of XYZ experiments the same translation. Vectorially speaking, translation from X to X' is defined by:
Where
is the vector translation.
If we know that
and
, then the vector translation is:
Then, we determine the coordinates for Y' and Z':
The coordinates are
and
.
Ответ:
radius = 7π
Step-by-step explanation:
The area (A) of a circle = πr² ← r is the radius
The area is given as 49π³ , equating gives
πr² = 49π³ ← divide both sides by π
r² = 49π² ← take the square root of both sides )
r =
= 7π