Area of quadrilateral

The perimeter of a building is 74'by 59'by 103'by 121'. How can the square footage of the building be calculated?

Transformation geometry proof: reflections(please answer with detail)

Show $_p*$_l*$_p*$_l*$_p*$_l*$_p is a reflection in a line parallel to line l note $_p is a reflection about the line p

Word problem (airports)

1998 airports are each connected in both directions to exactly three other airports. any airport can be reached from any other airport by a sequence of flights. it is decided to close down 200 of the airports, no two of which are connected by a single flight. show that this cane be done in such a way that any remaining airport can be reached by a sequence of flights from any other remaining airport.

Transformation geometry proof: reflection(*please answer with detail)

$_n$_m((x,y))= (x+6,y-3). Find equations for lines m and n. note: $_a is a reflection about line a

Tangency of three circles Tangency of 3rd circle to other circles

Tangency of three circles B elow is how I created the sketch shown in the other attachment: 1. Create two tangent circles with centers A and B. For convenience sake, let circle A have the larger radius. 2. Find the midpoint of segment AB. Call it M. 3. Draw the circle with center M passing through A and B. Label this circle's lower intersection point with circle A as F and that with circle B as G. 4. Draw the circle whose center is F that passes through G and the circle whose center is G that passes through F -- the classic Euclidean co... click for more