Find the perimeter of the following shape, rounded to the nearest tenth:
Shape ABCD is shown. Point A is at negative 3, 5. Point B is at 1, 7. Point C is at 3, 3. Point D is at negative 1, 1.
9.8
16
17.9
24
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OpenStudy (nirmalnema):
do u have any fig
OpenStudy (anonymous):
yea i do @nirmalnema
here
OpenStudy (anonymous):
Okay
OpenStudy (nirmalnema):
A=(-3,5)
B=1, 7.
C=3, 3
D=-1, 1.
NOW BY DISTANCE FORMULA U CAN FIND LENGTH OF SIDE
AB , BC ,CD ,DA
DISTANCE FORMULA=
\[\sqrt{(x1−x2)^{2}+(y1−y2)^{2}}\]
OpenStudy (nirmalnema):
lengths are
AB= \[\sqrt{20}\]
BC= \[\sqrt{20}\]
CD= \[\sqrt{20}\]
DA= \[\sqrt{20}\]
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OpenStudy (anonymous):
\[\sqrt{20}=4.47\]
right
OpenStudy (nirmalnema):
NOW PERIMETER = SUM OF ALL THE SIDE LENGTH
=\[\sqrt{20}+\sqrt{20}+ \sqrt{20}+ \sqrt{20}\]
=\[4\sqrt{20}\]
=4*4.47
OpenStudy (nirmalnema):
YUP U R RIGHT
OpenStudy (nirmalnema):
17.88
OpenStudy (anonymous):
the answer is C right
because there is no 17.88
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