Question

to verify experimentally that in a triangle the longer side has the greater angle opposite to it

Answer 1

Step-by-step explanation:

Take a cardboard of suitable size and by using adhesive, paste a white paper on it.

Cut out a ΔABC from a glazed paper and by using adhesive, paste it on cardboard, (see Fig. 15.1)

ncert-class-9-maths-lab-manual-verify-triangle-longer-side-greater-angle-11

Measure the lengths of all the three sides of ΔABC and identify that

Answer 2

Procedure:

Take a cardboard of suitable size and by using adhesive, paste a white paper on it.

Cut out a pair of ΔABC and ΔDEF from glazed paper such that AB = DE, BC = EF and AC = DF. (see Fig. 14.2)

Make a pair of ΔGHI and ΔJKL on glazed paper such that GH = JK, Gl = JL and ∠G = ∠J and cut them out. (see Fig. 14.3)

Make a pair of ΔPQR and ΔSTU from glazed paper such that QR = TU, ∠Q = ∠T and ∠R = ∠U and cut them out. (see Fig. 14.4)

Make two right angle triangles such that ΔXVZ and ΔLMN from glazed paper such that YZ = MN, XZ = LN and ∠X = ∠L = 90°. (see Fig. 14.5)

Hope it helps friend !