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Celeste International School

Grade 4 · Worksheet

2D shape and pattern

Types of triangles

Name: ______________________________Date: ______________Score: ______ / 20
  1. 1.

    What is a triangle with all three sides equal called?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  2. 2.

    What is a triangle with exactly two equal sides called?

    1. AIsosceles
    2. BEquilateral
    3. CScalene
    4. DSquare
  3. 3.

    What is a triangle with no equal sides called?

    1. AScalene
    2. BEquilateral
    3. CIsosceles
    4. DRegular
  4. 4.

    How many equal sides does an equilateral triangle have?

  5. 5.

    Each angle in an equilateral triangle is how many degrees?

    °
  6. 6.

    A triangle has sides 5 cm, 5 cm and 8 cm. What type is it?

    1. AIsosceles
    2. BEquilateral
    3. CScalene
    4. DRight-angled
  7. 7.

    A triangle has sides 3 cm, 4 cm and 5 cm. What type is it?

    1. AScalene
    2. BIsosceles
    3. CEquilateral
    4. DRegular
  8. 8.

    How many equal sides does an isosceles triangle have?

  9. 9.

    An equilateral triangle has three equal sides and three equal angles.

    True False
  10. 10.

    A scalene triangle has two equal sides.

    True False
  11. 11.

    A triangle has sides 3 cm, 3 cm and 3 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  12. 12.

    A triangle has sides 4 cm, 4 cm and 4 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  13. 13.

    A triangle has sides 5 cm, 5 cm and 5 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  14. 14.

    A triangle has sides 6 cm, 6 cm and 6 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  15. 15.

    A triangle has sides 7 cm, 7 cm and 7 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  16. 16.

    A triangle has sides 8 cm, 8 cm and 8 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  17. 17.

    A triangle has sides 9 cm, 9 cm and 9 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  18. 18.

    A triangle has sides 10 cm, 10 cm and 10 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  19. 19.

    A triangle has sides 11 cm, 11 cm and 11 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
  20. 20.

    A triangle has sides 12 cm, 12 cm and 12 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
    4. DRight-angled
Celeste International School

Answer key

2D shape and pattern — Types of triangles

  1. 1.A. Equilateral
  2. 2.A. Isosceles
  3. 3.A. Scalene
  4. 4.3
  5. 5.60 °
  6. 6.A. Isosceles
  7. 7.A. Scalene
  8. 8.2
  9. 9.True
  10. 10.False
  11. 11.A. Equilateral
  12. 12.A. Equilateral
  13. 13.A. Equilateral
  14. 14.A. Equilateral
  15. 15.A. Equilateral
  16. 16.A. Equilateral
  17. 17.A. Equilateral
  18. 18.A. Equilateral
  19. 19.A. Equilateral
  20. 20.A. Equilateral