Activity 18
To verify experimentally that in a triangle, the longer side has the greater angle opposite to it.
MATERIAL REQUIREDDEMONSTRATION
Take the cut-out angle and compare it with other two angles as shown in Fig. 4.
∠A is greater than both ∠B and ∠C.
i.e., the angle opposite the longer side is greater than the angle opposite the other side.
OBSERVATION
Length of side AB = .......................
Length of side BC = .......................
Length of side CA = .......................
Measure of the angle opposite to longest side = .......................
Measure of the other two angles = ...................... and .......................
The angle opposite the ...................... side is ...................... than either of the other
two angles.
APPLICATION
The result may be used in solving different geometrical problems.
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