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Isosceles, Equilateral and Right Triangles ~1~ 1. How many sides need to be congruent if the triangle is isosceles? 8. Classify the following triangle by its sides. 2. Classify the following triangle by its sides. B 9. Classify the following triangle by its angles. A 30 ° C 3. Classify the following triangle by D its sides 60 ° 4. How many sides need to be congruent if the triangle is equilateral? 10. Given the dimensions of a triangle are 6, 8, 8 classify the triangle by its sides. A. equilateral B. isosceles C. scalene D. equiangular 5. How many angles will be congruent if a triangle is scalene? 11. Given the following triangle classify it by angles and sides. 8 9 F 8 E 6. Classify the following triangle by its sides. 7. Classify the following triangle by its sides. Southern Nevada Regional Professional Development Program A. right isosceles B. obtuse isosceles C. acute scalene D. right scalene Isosceles, Equilateral and Right Triangles 12. Classify the following triangle by its sides. ~2~ 7 7 7 A. right C. scalene B. equilateral D. isosceles 13. How many angles will be congruent if a triangle is equilateral? A. 1 B. 2 C. 3 D. none 14. True/False. There can be more than one right angle in a triangle. 15. Given: AC ⊥ CB Prove: ΔABC is a right triangle. B A C Southern Nevada Regional Professional Development Program