Rectangle A measures 12 cm by 3 cm. Rectangle B is a scaled copy of Rectangle A. Select [b]all[/b] of the measurement pairs that could be the dimensions of Rectangle B.[list=1][*]6 cm by 1.5 cm[/*][*]10 cm by 2 cm[/*][*]13 cm by 4 cm[/*][*]18 cm by 4.5 cm[/*][*]80 cm by 20 cm[/*][/list]

Rectangle A has length 12 and width 8. Rectangle B has length 15 and width 10. Rectangle C has length 30 and width 15.[list=1][*]Is Rectangle A a scaled copy of Rectangle B? If so, what is the scale factor?[/*][*]Is Rectangle B a scaled copy of Rectangle A? If so, what is the scale factor?[/*][*]Explain how you know that Rectangle C is [i]not[/i] a scaled copy of Rectangle B.[/*][*]Is Rectangle A a scaled copy of Rectangle C? If so, what is the scale factor?[/*][/list]

Here are three polygons.[img]https://cdn.openupresources.org/uploads/pictures/8/8.2.A1.newPP.Image.01.png[/img][list=1][*]Draw a scaled copy of Polygon A with scale factor 12.[/*][*]Draw a scaled copy of Polygon B with scale factor 2.[/*][*]Draw a scaled copy of Polygon C with scale factor 14.[/*][/list]

Which of these sets of angle measures could be the three angles in a triangle?[list=1][*]40∘, 50∘, 60∘[/*][*]50∘, 60∘, 70∘[/*][*]60∘, 70∘, 80∘[/*][*]70∘, 80∘, 90∘[/*][/list]

In the picture lines AB and CD are parallel. Find the measures of the following angles. Explain your reasoning.[img]https://cdn.openupresources.org/uploads/pictures/8/8.1.D.PP.Image.02.png[/img][list=1][*]∠BCD[/*][*]∠ECF[/*][*]∠DCF[/*][/list]