4. Review Exercise
Tick the correct option.
1) A triangle is formed by joining
a) 3 points
b) 3 collinear points
c) 3 lines
d) 3 non collinear points
4Kavita Grover
10. Angle sum property of a Triangle
The sum of the angles of a triangle is 180˚.
A
B C
A+ B+ C = 180˚
A
B
C
A+ B+ C= 180˚
10Kavita Grover
11. Side property of a Triangle
The sum of the lengths
of any two sides is
always greater than the
length of the third side .
Side AB= 5cm
Side BC= 5cm
Side CA= 5 cm
AB+BC >CA
5cm+5cm >5cm
10 cm>5cm
BC+CA>AB
5cm+5cm >5cm
10cm>5cm
A
B C
11Kavita Grover