The idea of a rigid motions is a
significant concept in geometry.
Explain what a rigid motion is and why it
is important. Using the diagram below
identify the specific rigid motions used
for the following shapes.

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

The circumference of a circle is 5 pi cm. what is the area of the circle?

Find the greatest common factor of the polynomial: 10x^5+15x^4-25x^3 10x^5 x^3 5x^3 5