From a piece of paper cut out an isosceles triangle XYZ with XY=XZ (Fig 6.20). Fold it such that Z lies on Y. The line XM through X is now the axis of symmetry (whichyou will read in Chapter 14). You find that Y and Z fit on each other exactly XY andXZ are called equal sides: YZ is called the base; Y and Z are called base angles andthese are also equalThus, in an isosceles triangle:(1) two sides have same length.(ii) base angles opposite to the equal sides are equal.

From a piece of paper cut out an isosceles triangle XYZ with XY=XZ (Fi

1.	From a piece of paper cut out an isosceles triangle XYZ with XY=XZ (Fig 6.20). Fold it such that Z lies on Y. The line XM through X is now the axis of symmetry (whichyou will read in Chapter 14). You find that Y and Z fit on each other exactly XY andXZ are called equal sides: YZ is called the base; Y and Z are called base angles andthese are also equalThus, in an isosceles triangle:(1) two sides have same length.(ii) base angles opposite to the equal sides are equal.
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