CBSE Book Class 7 Maths Activity 3

To verify, by paper cutting and pasting, that if two parallel lines are intersected by a transversal, then –

(i) each pair of corresponding angles are equal

(ii) each pair of alternate interior angles are equal

(iii) each pair of interior angles on the same side of the transversal are supplementary.

Learning Objective : To establish the properties relating to different pairs of angles formed by a transversal with two parallel lines.

Pre-requisite :V Knowledge and identification of pairs of corresponding angles, pairs of alternate interiors angles and pairs of interior angles on the same side of the transversal.

Materials Required : Sheets of white and coloured papers, a pair of scissors, glue, a geometry box, carbon paper and a pencil/pen.

Procedure : 

Step 1. Draw two lines l and l parallel to each other and a transversal l intersecting them. 1 2 3 Label the angles thus obtained by numbers 1 to 8 [Fig. 3(a)].

Step 2.Make a cut out of Ð1 on a coloured paper placing it below the figure and marking impressions by using carbon paper or tracing paper.

Step 3. Place the cutout of the angle on Ð5 and check whether the two angles cover each other or not. Note that these angles make a pair of corresponding angles.

Please refer to the link below - CBSE Class 7 Maths Activity 3