Classification of angles and triangles
| __ | 1. | acute angle | | A. | has three equal sides | | __ | 2. | acute triangle | | B. | has at least two equal sides | | __ | 3. | equiangular triangle | | C. | has three acute angles | | __ | 4. | equilateral triangle | | D. | no sides have the same length | | __ | 5. | isosceles triangle | | E. | contains a right angle | | __ | 6. | obtuse angle | | F. | contains an obtuse angle | | __ | 7. | obtuse triangle | | G. | has three equal angles | | __ | 8. | reflex angle | | H. | measures between 0 and 90 degrees | | __ | 9. | right triangle | | I. | measures between 90 & 180 degrees | | __ | 10. | scalene triangle | | J. | measures between 180 and 360 degrees |
| __ | 11. | all triangles do this | | A. | measures 90 degrees | | __ | 12. | ALL triangles have | | B. | measures 180 degrees | | __ | 13. | a polygon with three sides | | C. | have angles totaling 180 degrees | | __ | 14. | congruent triangles would be | | D. | sides and angles | | __ | 15. | it is not possible to have | | E. | three sides | | __ | 16. | place where two sides meet | | F. | a triangle with one angle of 181 degrees | | __ | 17. | right angle | | G. | the same size and the shape | | __ | 18. | similar triangles may be - | | H. | triangle | | __ | 19. | straight angle | | I. | different sizes but similar shapes | | __ | 20. | triangles are classified by - | | J. | vertex |
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