Given a parallelogram ABCD, with AD = AB. The bisector of angle A intersects BC at G, and the bisector of angle B intersects AD at H. Prove that ABGH is a rhombus.

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Two triangles can be formed with the given information. use the law of sines to solve the triangles. b = 49°, a = 16, b = 14

Is there a direction u in which the rate of change of f(x, y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.