(p. 482) As you will see, _____ is useful in coordinate proofs whenever you need to show that lines are parallel or perpendicular.
(P. 430) The __________ of a trapezoid is the segment whose endpoints are the midpoints of the legs.
(p. 386) If a quadrilateral is a parallelogram, then its opposite ______ are congruent.
(p. 383) A(n) _____________ that has two pairs of parallel sides.
(p. 417) If one angle of a parallelogram is a(n) _____ angle, then the parallelogram is a rectangle.
(p. 395) If both pairs of opposite sides of a quadrilateral are _________, then the quadrilateral is a parallelogram.
(p. 409) A(n) ______ is a quadrilateral with four sides congruent and four right angles.
(p. 385) If a quadrilateral is a parallelogram, then its opposite _____ are congruent.
(p. 396) If ____ pairs of opposite angles of a quadrilateral are congruent, then the quadrilateral is a parallelogram.
(p. 482) Remember that the _________ Formula is length = √[(x2 - x1)²+(y2 - y1)2].
(p. 427) A(n) _________ is a quadrilateral with at least one pair of parallel sides.
(p. 482) The slopes of opposite sides are equal. This means opposite sides are ________.
(p. 494) You can use _________ and area techniques to solve problems.
(p. 405) A(n) _________ is a quadrilateral with four right angles.
(p. 384) A segment that connects two nonconsecutive vertices of a polygon is a(n) _______.
(p. 431) The midsegment of a trapezoid is parallel to each base, and its length is one half the ___ of the lengths of the bases.
(p. 396) If one pair of ________ of a quadrilateral are parallel and congruent, then the quadrilateral is a parallelogram.
(p. 431) You can use the Trapezoid Midsegment ______ to find the length of the midsegment or a base of a trapezoid.
(p. 892) The _______ of the central angle is equal to 360°/n, in which n is the number of sides of the polygon.
(p. 892) A(n) _______ angle of a regular polygon has its vertex at the center, and its sides pass through consecutive vertices.
(p. 815) To identify a three-dimensional figure from a net, look at the number of ____s and the shape of each ____.