18. A triangle with one obtuse angle. A. Acute triangle B. Right triangle C. Equilateral triangle D. Obtuse triangle 19. A quadrilateral with two pairs of opposite sides parallel to each other A. Trapezoid B. Rhombus C. Quadrilateral D. Parallelogram 20. A triangle with no two sides congruent. A. Acute triangle B. Isosceles triangle C. Equilateral triangle D. Scalene triangle 21. If the sum of the interior angles of a regular hexagon is 720°, what is measure of each interior angle? A. 120° B. 90° C. 180° D. 60° 22. If the sum of the interior angles of a rectangle is 360°, what is measure of each interior angle? A. 90° B. 190° C. 80° D. 60° 23. If the sum of the interior angles of an equiangular triangle is 180°, what is measure of each interior angle? 60° B 90° C. 80° D. 160° 24. What is the sum of interior angle of a NONAGON? ano C. "90"n 760° weit, JLINE fa B. 10cm, 2urtangem C. 34cm, 16cm,5cm triangle is true? D. 7cm, 3cm, 2cm