Rectangle A measures 12 cm by 3 cm. Rectangle B is a scaled copy of Rectangle A. Select all of the measurement pairs that could be the dimensions of Rectangle B.

Rectangle A has length 12 units and width 8 units. Rectangle B has length 15 units and width 10 units. Rectangle C has length 30 units and width 15 units.

1. Is Rectangle A a scaled copy of Rectangle B? If so, what is the scale factor?
2. Is Rectangle B a scaled copy of Rectangle A? If so, what is the scale factor?
3. Explain how you know that Rectangle C is not a scaled copy of Rectangle B.
4. Is Rectangle A a scaled copy of Rectangle C? If so, what is the scale factor?

Here are 3 polygons.

1. Draw a scaled copy of Polygon A with scale factor \(\frac 1 2\).

2. Draw a scaled copy of Polygon B with scale factor 2.

3. Draw a scaled copy of Polygon C with scale factor \(\frac 1 4\).

Which of these sets of angle measures could be the 3 angles in a triangle?

Lines \(AB\) and \(CD\) are parallel. Find the measures of the following angles. Explain your reasoning.

Three lines in a plane. Line A B. Line B F. Line D E. Lines B F and A B intersect at the point B. Lines B F and D E intersect at point C. Line D E is above line A B. Angle A B F is labeled 38 degrees.

1. Angle \(BCD\)

2. Angle \(ECF\)

3. Angle \(DCF\)