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For Review Exercises 19 to 24, decide whether the statements are always true (A), sometimes true (S), or never true (N). 19. An isosceles triangle is a right triangle. 20. An equilateral triangle is a right triangle. 21. A scalene triangle is an isosceles triangle.

For Review Exercises 19 to 24, decide whether the statements are always true (A), sometimes true (S), or never true (N). 19. An isosceles triangle is a right triangle. 20. An equilateral triangle is a right triangle. 21. A scalene triangle is an isosceles triangle.

Elementary Geometry For College Students, 7e
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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2:24 1 K Elementary-Geometry-f... 000 mZA = 3x + y A mZD = 5x + 10 B mZC = 5y + 20 Find: mZB For Review Exercises 19 to 24, decide whether the statements are always true (A), sometimes true (S), or never true (N). 19. An isosceles triangle is a right triangle. 20. An equilateral triangle is a right triangle. 21. A scalene triangle is an isosceles triangle. 22. An obtuse triangle is an isosceles triangle. 23. A right triangle has two congruent angles. 24. A right triangle has two complementary angles. 25. Complete the following table for regular polygons. | 12 Number of sides 8 20 Measure of each exterior 24 36 Measure of each interior 2 157.5 178 Number of diagonals For Review Exercises 26 to 29, sketch, if possible, the polygon described. 26. A quadrilateral that is equiangular but not equilateral 27. A quadrilateral that is equilateral but not equiangular 28. A triangle that is equilateral but not equiangular 29. A hexagon that is equilateral but not equiangular For Review Exercises 30 and 31, write the converse, inverse, and contrapositive of each statement. 30. If two angles are right angles, then the angles are cong 1 electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). g reserves the right to remove additional content at any time if subsequent rights restrictions require it.
Transcribed Image Text:2:24 1 K Elementary-Geometry-f... 000 mZA = 3x + y A mZD = 5x + 10 B mZC = 5y + 20 Find: mZB For Review Exercises 19 to 24, decide whether the statements are always true (A), sometimes true (S), or never true (N). 19. An isosceles triangle is a right triangle. 20. An equilateral triangle is a right triangle. 21. A scalene triangle is an isosceles triangle. 22. An obtuse triangle is an isosceles triangle. 23. A right triangle has two congruent angles. 24. A right triangle has two complementary angles. 25. Complete the following table for regular polygons. | 12 Number of sides 8 20 Measure of each exterior 24 36 Measure of each interior 2 157.5 178 Number of diagonals For Review Exercises 26 to 29, sketch, if possible, the polygon described. 26. A quadrilateral that is equiangular but not equilateral 27. A quadrilateral that is equilateral but not equiangular 28. A triangle that is equilateral but not equiangular 29. A hexagon that is equilateral but not equiangular For Review Exercises 30 and 31, write the converse, inverse, and contrapositive of each statement. 30. If two angles are right angles, then the angles are cong 1 electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). g reserves the right to remove additional content at any time if subsequent rights restrictions require it.
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