Amodel airplane takes off at a con height , in feet , after seconds ball is launched from ground level second . the height of the ball , h = - 16t ^ 2 + 45t . will the airplane and takes for the collision to occur. at a constant rate of 15 feet per second . its seconds is given by h at the same time , a round level with an initial velocity of 45 feet per of the bal , in feet , after seconds is given by and ball collide ? if so , find the time it

Given: in quadrilateral wxyz , and bisect each other at point a. prove: quadrilateral wxyz is a parallelogram. statement reason 1. and bisect each other. given 2. wa = ya xa = za definition of bisection 3. m∠yaz = m∠xaw vertical angles theorem 4. sas criterion for congruence 5. ∠ ywx ≅ ∠wyz corresponding angles of congruent triangles are congruent. 6. || converse of alternate interior angles theorem 7. m∠xay = m∠zaw vertical angles theorem 8. ∆xay ≅ ∆zaw sas criterion for congruence 9. ∠xzw ≅ ∠zxy corresponding angles of congruent triangles are congruent. 10. || converse of alternate interior angles theorem 11. quadrilateral wxyz is a parallelogram. definition of parallelogram what is the missing statement in this proof? what is the missing statement in this proof?