1. A two dimensional rotation is applied to an object by

a) Repositioning it along with straight line path

b) Repositioning it along with circular path

c) Only b

d) Any of the mentioned

View Answer

Explanation: A two dimensional rotation is applied to an object by repositioning it along with circular path.

2. To generate a rotation , we must specify

a) Rotation angle ϴ

b) Distances dx and dy

c) Rotation distance

d) All of the mentioned

View Answer

Explanation: Generate a rotation, we must specify rotation angle ϴ of the rotation point or pivot point which the object is to be rotated.

3. Positive values for the rotation angle ϴ defines

a) Counterclockwise rotations about the end points

b) Counterclockwise translation about the pivot point

c) Counterclockwise rotations about the pivot point

d) Negative direction

View Answer

Explanation: A positive value for the rotation angle ϴ defines counterclockwise rotations about the pivot point.

a) Rotation

b) Translation

c) Scaling

d) Shearing

View Answer

Explanation: The rotation transformation is also described as a rotation about a rotation axis that is perpendicular to the xy plane and passes through the pivot point.

5. The original coordinates of the point in polor coordinates are

a) X’=r cos (Ф +ϴ) and Y’=r cos (Ф +ϴ)

b) X’=r cos (Ф +ϴ) and Y’=r sin (Ф +ϴ)

c) X’=r cos (Ф -ϴ) and Y’=r cos (Ф -ϴ)

d) X’=r cos (Ф +ϴ) and Y’=r sin (Ф -ϴ)

View Answer

Explanation: The original coordinates of the point in polor coordinates are X’=r cos (Ф +ϴ) and Y’=r sin (Ф +ϴ).

6. The two-dimensional rotation equation in the matrix form is

a) P’=P+T

b) P’=R*P

c) P’=P*P

d) P’=R+P

View Answer

Explanation: The 2D translation equation is P’=R*P.

7. ________ is the rigid body transformation that moves object without deformation.

a) Translation

b) Scaling

c) Rotation

d) Shearing

View Answer

Explanation: Rotation is the rigid body transformation that moves object without deformation.

a) End points

b) Major and minor axes

c) Only a

d) None

View Answer

Explanation: None.

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