### 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)