What is the length of the arc with a measure of 100 degrees in a circle of radius 15 inches

Sal is tiling his entryway. the floor plan is drawn on a unit grid. each unit length represents 1 foot. tile costs $1.35 per square foot. how much will sal pay to tile his entryway? round your answer to the nearest cent.

In trapezoid efgh, m∠gfe=63∘. identify m∠ghe. !

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle