Two intersecting circles have a common chord with length 16 ft. the radii of the circles are 10 ft and 17 ft respectively. express the distance between the centers of the circles in feet.

Solve the system of equations. y= 2x y= x^2 - 15

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?

Polygon abcd is a rectangle what is the area