If two sides of a triangle are 5 cm and 9 cm, then the third side is ______________

An equilateral triangle is

Which of the following is not possible?

Which of the following can be the sides of an isosceles triangle?

Every triangle has at least __________ acute angles.

In an isosceles triangle ______________ angles are equal.

The sum of three angles of a triangle is ___________.

A right angled triangle with two equal sides is called _____________.

In \(\Delta\)ABC, name the
a) Three sides: ______ , ______ , _______
b) Three Angles: ______ , ______ , _______
c) Three Vertices: ______ , _______ , _______

I am a closed figure with each of my three angles is 60°. Who am I?

Draw a line segment AB of length 6 cm. At each end of this line segment AB, draw a line perpendicular to the line AB. Are these lines parallel?

Can a triangle be formed with the angles 80°, 30°, 40°?

Draw a line and mark a point R below it at a distance of 5.4 cm Through R draw a line parallel to the given line.

Can a triangle be formed with the following angles? If yes, name the type of triangle.
(i) 60°, 60°, 60° 
(ii) 90°, 55°, 35° 
(iii) 60°, 40°, 42°
(iv) 60°, 90°, 90°
(v) 70°, 60°, 50°
(vi) 100°, 50°, 30°

Draw a line segment AB = 6.5 cm and mark a point M above it. Through M draw a line parallel to AB.

Two sides of the triangle are given in the table. Find the third side of the triangle.