The Triangle and its Properties - Worksheets

 CBSE Worksheet-1

CLASS – VII Mathematics (The triangle and its properties)

Choose correct option in questions 1 to 4.

  1. How many altitudes can a triangle have?
    a) 3
    b) 2
    c) 1
    d) None of these
  2. Write the side opposite to the vertex B of ΔABC.
    a) AB
    b) AC
    c) BC
    d) None of these
  3. A triangle in which, two sides act as the two altitudes is ___________________.
    a) acute-angled triangle
    b) obtuse-angled triangle
    c) right-angled triangle
    d) None of these
  4. Answer in Yes or No.
    a) Is it possible for a triangle to have two right angles? __________
    b) Is it possible for a triangle to have two obtuse angles?__________

Fill in the blanks:

  1. A ____________ is a simple closed curve made of three-line segments.
  2. An ___________ has one end point at a vertex of the triangle and the other end point is contained in the opposite side to the vertex.
  3. The sum of interior opposite angles is ____when the exterior angle is right angle.
  4. The sum of the lengths of any two sides of a triangle is _________the third side.
  5. An exterior angle of a triangle is of measure 70º and one of its interior opposite angles is of measure 25º. Find the measure of the other interior opposite angle.
  6. Is a triangle possible with length of the sides as 10.2 cm, 5.8 cm and 4.5 cm?

CBSE Worksheet-1
CLASS – VII Mathematics (The triangle and its properties)
Answer key

  1. a
  2. b
  3. c
  4. a. No
    b. No
  5. triangle
  6. altitude
  7. right angle or 90º
  8. greater than
  9. 45º
  10. Yes because sum of any two sides taken is always greater than the third side.