In a cyclic quadrilateral ABCD, AD is parallel to BC. The bisector
of <BAD meets BC at E and the circle at F. Prove that:
EF=FC ( BF - DF

Which of the following statements is not true? a. parallel lines are lines in the same plane that never intersect. b. congruent figures have the same shape and same size angles and sides. c. similar figures must have the same shape and the same size. d. a rotation is when you turn a figure around a certain point.

Which data set has a greater spread? why? set a: {38, 12, 23, 48, 55, 16, 18} set b: {44, 13, 24, 12, 56} has a greater spread because .

Which statement justifies why angle ebc measures 90?