In each of the following, fill in the word needed to make the resulting sentence true. a. A quadrilateral is a ____ if, and only if, its diagonals are perpendicular.its diagonals are perpendicular. nothing nothing b. A quadrilateral is a ____ if, and only if, its diagonals are congruentits diagonals are congruent and bisect each other.and bisect each other. nothing Question content area bottom Part 1 Fill in the word needed to make the resulting sentence true. If none of the words makes the sentence true, choose 'none.' a. A quadrilateral is a ▼ parallelogram square none kite isosceles trapezoid rhombus trapezoid rectangle if, and only if, its diagonals are perpendicular.its diagonals are perpendicular. nothing nothing Part 2 b. A quadrilateral is a ▼ rectangle trapezoid kite isosceles trapezoid rhombus none parallelogram square if, and only if, its diagonals are congruentits diagonals are congruent and bisect each other.and bisect each other.