After a rotation of 90 degrees the images are (-3,5) (-1,4) (-4,2). Find the coordinates of the pre image

This figure consists of a rectangle and semicircle. what is the perimeter of this figure use 3.14 for pi 60.84m 72.84m 79.68m 98.52m

Δabc is dilated by a scale factor of 3 with the origin as the center of dilation to form δa′b′c′. the slope of is -1.2. the length of is p units, the length of is q units, and the length of is r units. the slope of is . the length of is units.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.