And so this would be negative 90 degrees, definitely feel good about that. And this looks like a right angle, definitely more like a rightĪngle than a 60-degree angle. Rotation Calculator: Find 90 Degree Rotations. Is a 90 Degree rotation clockwise or counterclockwise Considering that the rotation is 90 Degree, you should rotate the point in a clockwise direction. And once again, we are moving clockwise, so it's a negative rotation. math unblocked cool game racingcargames ahkong description Rotate glueyRun 2 cool math games. This is where D is, and this is where D-prime is. Point and feel good that that also meets that negative 90 degrees. This looks like a right angle, so I feel good about A rotation is a type of rigid transformation, which means that the size and shape of the figure does not change the figures are congruent before and after the transformation. We are going clockwise, so it's going to be a negative rotation. In geometry, a rotation is a type of transformation where a shape or geometric figure is turned around a fixed point. Too close to, I'll use black, so we're going from B toī-prime right over here. Let me do a new color here, just 'cause this color is Much did I have to rotate it? I could do B to B-prime, although this might beĪ little bit too close. I can take some initial pointĪnd then look at its image and think about, well, how I don't have a coordinate plane here, but it's the same notion. Well, I'm gonna tackle this the same way. So once again, pause this video, and see if you can figure it out. Conventions by intrinsic rotations edit (or ) represents a rotation around the z axis, (or ) represents a rotation around the x axis, (or ). So we are told quadrilateral A-prime, B-prime, C-prime,ĭ-prime, in red here, is the image of quadrilateralĪBCD, in blue here, under rotation about point Q. 3.5K 282K views 4 years ago Algebra 1 Learn how to rotate figures about the origin 90 degrees, 180 degrees, or 270 degrees using this easier method. So just looking at A toĪ-prime makes me feel good that this was a 60-degree rotation. And if you do that with any of the points, you would see a similar thing. Another way to thinkĪbout is that 60 degrees is 1/3 of 180 degrees, which this also looks Like 2/3 of a right angle, so I'll go with 60 degrees. One, 60 degrees wouldīe 2/3 of a right angle, while 30 degrees wouldīe 1/3 of a right angle. This 30 degrees or 60 degrees? And there's a bunch of ways The counterclockwise direction, so it's going to have a positive angle. And where does it get rotated to? Well, it gets rotated to right over here. Remember we're rotating about the origin. Points have to be rotated to go from A to A-prime, or B to B-prime, or from C to C-prime? So let's just start with A. So I'm just gonna think about how did each of these So like always, pause this video, see if you can figure it out. We're told that triangle A-prime, B-prime, C-prime, so that's this red triangle over here, is the image of triangle ABC, so that's this blue triangle here, under rotation about the origin, so we're rotating about the origin here.
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