1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irga5000 [103]
3 years ago
10

After a rotation of 90° about the origin, the coordinates of the vertices of the image of a triangle are A'(6, 3), B'(–2, 1), an

d C'(1, 7). What are the coordinates of the vertices of the pre-image?
Mathematics
2 answers:
Licemer1 [7]3 years ago
4 0
Assuming the original was rotated counterclockwise, and this only works for a rotation about the origin, a rotation of 90 degrees switches the x and y coordinate and depending on which part of the graph (quadrant) it is in the signs may change as well.  First, and the trickiest part is finding how the signs change. 

There are four quadrants, first, second third and fourth starting with the upper right than upper left than lower left then lower right.Since none of the veracities have a 0 in them we don't have to worry about the x or y axis, though it is worth realizing each axis is 90 degress from the others.  So something  at 2 on the x axis (2,0) moves 90 degrees counterclockwise would then be at 2 on the y axis (0,2) and moves one more time would be at (-2,0).

A' is in the first quadrant (upper right) so the previous quadrant 90 degrees clockwise is the fourth quadrant (lower right).  The signs of the coordinates then will go from (+,+) to (+,-).

Now that we have the signs we just switch the coordinates so (6,3) goes to (3,6) and the sign change makes it (3,-6).  Just follow this pattern with the other two points (-2,1), and (1,7) find the signs by figuring out the previous quadrant than switch the coordinates and apply the sign changes
iragen [17]3 years ago
3 0

A=(3,-6) B=(1,2) C=(7,-1)

You might be interested in
Evaluate the expression when c=4.<br>c²+5​
Sauron [17]
21 I think cause you use pemdas
4 0
3 years ago
Read 2 more answers
Please help I really need it​
yawa3891 [41]

Answer: m< MIH is 34°

M< AVM is 70°

And the angle of the obtuse angle formed at the intersection of AV and HI is 104°

Step-by-step explanation: starting with m<MIH, AH is parallel to MI, so that would make the same angle H has the same for I. (34°)

Next is m<AVM. The angle of m<LAH is 110°. So the angle of m<HAV (because it's supplementary of it) is 70 (110+70=180). Which makes m<AVM 70° since it's vertical to each other.

Since we got those answers, the next one you just plug it in, and the answer would be 104°

5 0
3 years ago
4. Which value of x makes the equation true? 0.4(5 - 2x) = 3 -0.6(x - 1)​
o-na [289]

Step-by-step explanation:

5 0
2 years ago
What is 3 and 3/4 times 2 and 2/5.please explain process
love history [14]
What you do is turn them in to improper fractions 
you will have 15/4 times 12/5 then multiply 
you would get 180/20 and you simplify it to get
9/1 witch = 9 
5 0
3 years ago
5 = –6x2 + 24x
Marat540 [252]

Answer:

x = 2 - sqrt(19/6)

x = 2 + sqrt(19/6)

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Please answer this question now
    12·1 answer
  • Two numbers are less than 100.their GCF is 15.the smallest number is 1.3 of the large number . What are the numbers?
    5·1 answer
  • Micheal works 15.5 hours each week of a music store. He earns $9.48 per hour. How much does Micheal earn each week?
    10·2 answers
  • Give you the brainlest if can just can with me
    11·2 answers
  • Solve the equation.<br> 5x + 6 = 2(2x – 3)<br><br> x =
    12·2 answers
  • FIND 11 DIVIDED 10 AND 10 DIVIDED 11. WRITE EACH QUOTIENT AS A FRACTION OR MIXED NUMBER.
    6·1 answer
  • What is the answer to <br> 3 + 2x = -6x + 4
    11·1 answer
  • The questions are in the picture<br> (I’LL GIVE BRAINLEST) <br> PLEASEEEEEEEEEEE HELPPPPPPP
    9·1 answer
  • 50 POINTS!!!! PLEASE HELP!!!!!
    11·2 answers
  • Pls answer thissssssss
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!