State whether true or false If the angles of DeltaPQR are in the ratio 1:2:3 , then the triangle formed is a scalene triangle.

Take several cut outs of (i) an equilateral triangle, (ii) an isosceles triangle and (iii) a scalene triangle. Find their altitudes and medians. Do you find any thing special about them? Discuss it with your friends.

Correct the following statements Every right angle forms a scalene triangle.

Draw a rough sketch of the following Acute angled scalene triangle.

State the number of lines of symmetry for the following figures: A scalene triangle

Try to draw rough sketches of a scalene right angled triangle.

Draw a rough sketch of the following Scalene right angled triangle

State the number of lines of symmetry for the following figures : (a) An equilateral triangle (b) An isosceles triangle (c) A scalene triangle (d) A square (e) A rectangle (f) A rhombus (g) A parallelogram (h) A quadrilateral (i) A regular hexagon (j) A circle

Draw the figures and state the number of lines of symmetry for the following : Scalene Triangle

What other name can you give to the line of symmetry of an isosceles triangle?