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hartmat
18.08.2019 •
Mathematics
Someone plz plz
the vertices of triangle ijk have coordinates i(−5, −2), j(−5, −4), and k(−4, −4).
which coordinates are the coordinates of the vertices of triangle iꞌjꞌkꞌ when triangle ijk is rotated 180° clockwise around the origin?
a.
iꞌ(5, 2), jꞌ(5, 4), kꞌ(4, 4)
b.
iꞌ(−2, 5), jꞌ(−4, 5), kꞌ(−4, 4)
c.
iꞌ(2, −5), jꞌ(4, −5), kꞌ(4, −4)
d.
iꞌ(−5, 2), jꞌ(−5, 4), kꞌ(−4, 4)
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Ответ:
Any point (x, y) rotated 180° about (0, 0) ⇒ (-x, -y)
Any point (x, y) rotated 90° CCW about (0, 0) ⇒ (x, -y)
I(−5, −2) rotated 180° about (0, 0) ⇒ (5, 2)
J(−5, −4) rotated 180° about (0, 0) ⇒ (5, 4)
K(−4, −4) rotated 180° about (0, 0) ⇒ (4, 4)
The correct answer is A.
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