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Question

What are the conditions to be satisfied for the construction of a triangle when perimeter and base angles are given?

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Solution


Construction of ΔABC, given the perimeter (AB + BC + CA) = 'a' cm, B=x and C=y.
Steps of construction:
Step 1: Draw the line segment XY = 'a' cm
Step 2: Draw the ray XL at X making an angle of x with XY
Step 3: Draw the ray YM at Y making an angle of y with XY
Step 4: Draw angle bisector of LXY.
Step 5: Draw angle bisector of MYX such that it intersects the angle bisector of LXY at a point A.
Step 6: Draw the perpendicular bisector of AX such that it intersects XY at a point B.
Step 7: Draw the perpendicular bisector of AY such that it intersects XY at a point C.
Step 8: Join AB and AC
Thus, ABC is the required triangle.

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