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4-6 Isosceles And Equilateral Triangles Worksheet Worksheet - Free Printable

Educational worksheet: 4-6 Isosceles And Equilateral Triangles Worksheet Worksheet. Download and print for classroom or home learning activities.

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1. (a) 65°
(b) 65°
(c) 50°
(d) 50°
(e) 65°
(f) 115°

2. Yes, every equilateral triangle is isosceles because it has at least two congruent sides (in fact, all three are congruent). No, not every isosceles triangle is equilateral because an isosceles triangle only requires two congruent sides, while an equilateral triangle requires all three sides to be congruent.

3. 65°, 65°

4. 5 cm, 5 cm

5. 60°, 60°, 60°

6. x = 67, y = 46

7. x = 70, y = 70

8. x = 58.5, y = 58.5

9. x = 40, y = 40

10. x = 75, y = 75

11. x = 45, y = 45

Parent Tip: Review the logic above to help your child master the concept of isosceles triangle theorem worksheet.

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