Page 75 - Math Course 3 (Book 2)

Identifying Triangles: Angles and Sides

Identify the indicated type of triangles.
7. right 8. isosceles

9. scalene 10. obtuse

ALGEBRA Find x and the measure of each side of the triangle.

11. △ABC is equilateral with AB = 3x – 2, BC = 2x + 4, and CA = x + 10.

12. △DEF is isosceles, ∠D is the vertex angle, DE = x + 7, DF = 3x – 1, and EF = 2x + 5.

Find the measures of the sides of △RST and classify each triangle by its sides.

13. R(0, 2), S(2, 5), T(4, 2)

14. R(1, 3), S(4, 7), T(5, 4)

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