Scaling and Angles in Geometry

What is the scale factor if a rectangle with dimensions 12 cm by 3 cm is scaled to a rectangle with dimensions 6 cm by 1.5 cm?

If rectangle A is a scaled copy of rectangle B with a scale factor of 4/5, what is the scale factor from B to A?

Which of the following is NOT a scaled copy of a rectangle with dimensions 12 units by 8 units?

When scaling a triangle by a factor of 1/2, what happens to its area?

If a quadrilateral is scaled by a factor of 2, what happens to its perimeter?

Which set of angles can form a triangle?

What is the sum of the angles in a triangle?

What type of angle is formed when two lines intersect and create equal opposite angles?

If two parallel lines are cut by a transversal, which angles are congruent?

What is the measure of an angle that is supplementary to a 38-degree angle?