The document discusses the classification of triangles based on the lengths of their sides and measures of their angles. Triangles can be classified as scalene, isosceles, or equilateral depending on whether they have no sides, two sides, or all three sides of equal length. They can also be classified as acute, right, obtuse, or equiangular based on the measures of their angles. Several examples of different types of triangles are provided.

1. PRAYER
CHECKING OF
ATTENDANCE

5. Triangles can be classified
according to number of
congruent sides. Similar
markings indicate congruent
parts.

6. No two sides are congruent

7. At least two sides are congruent

8. All sides are congruent

9. Triangles can also be
classified according
to their angles

10. All angles are acute.
72°
48°60°

11. One angle is a right angle.
50°
90° 40°

12. One angle is obtuse.
128°
30°
22°

13. All angles are congruent.
60°
60°
60°

14. Classification of triangle
Scalene
triangle
One angle is
obtuse
Acute
triangle
Three
sides are
congruent
Atleast
two side
are
congruent
Right
triangle

15. 1. 30°, 60°, 90°
2. 5 cm, 10 cm, 5 cm
3. 120°, 30°, 30°
4. 20m,20m,20m
5. 60°, 60°, 60°
6. 100°, 35°, 45°
7. 1 ft, 5 ft,3 ft
8. 8 inches, 8 inches, 8 inches

16. 1. Isosceles, acute
2. Isosceles, right
3. Isosceles,
obtuse
4. Scalene, obtuse
5. Scalene, acute
6. Isosceles, scalene
7. Scalene , right
8. Equilateral,
obtuse
9. Equiangular,
acute
10. Equilateral, right