+1982 Calculate the distance between the points (1,5) and (2,-3). Round your answer to the nearest tenth.
A. 8.3
B. 65.0
C. 31.4
D. 8.1
The pre-image of triangle ABC is rotated 90 degrees to image A’B’C’ about the origin. If point B is located at (-1,4), then name the coordinates of B’.
A. (-2,1)
B. (-1,-2)
C. (4,1)
D. (1,2)
The pre-image of triangle ABC is rotated 90 degrees to image A’B’C’ about the origin. If point C is located at (-3,4), then name the coordinates of C’.
A. (6,1)
B. (4,3)
C. (-1,-2)
D. (1,2)
What would be the coordinates of the image of (10,-4) rotated clockwise about the origin through a 90-degree angle?
A. (1, 2)
B. (6,1)
C. (-4, -10)
D. (-2,1)
+129852 D = sqrt [ difference in x coordinates ^2 + difference in y coordinates^2 ]
So
D = sqrt [( 1 - 2)^2 + ( -3 - 5)^2 ] = sqrt [ (-1)^2 + (-8)^2 ]
I leave you to calculate this.....I'll check your answer if you want
+1982 IS IT D ? also could you check the questions i asked earlier and i just posted
+129852 Not D
square ( - 1 )
square (-8 )
Add these
Take the sqrt of the result
+129852 The rule for a 90° clockwise rotation is
(x, y) ⇒ (y ,- x)
In other words ..... the original y becomes the new x and the the original x becomes the new y with a sign change
So
(10, - 4) ⇒ ( -4, -10)
+129852 The pre-image of triangle ABC is rotated 90 degrees to image A’B’C’ about the origin. If point B is located at (-1,4), then name the coordinates of B’.
See the other question for a 90° rotation (clockwise ??? )
If clockwise....we have
(-1, 4) ⇒ ( 4, 1)
The pre-image of triangle ABC is rotated 90 degrees to image A’B’C’ about the origin. If point C is located at (-3,4), then name the coordinates of C’.
(-3, 4) ⇒ (4 ,3)
