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Question

Construct DEF such that EF = 4.8 cm, E = 50° and DE + DF = 8.3 cm.

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Solution

Steps of construction:
1. Draw EF = 4.8 cm.
2. Draw ray EX, such that FEX=50°.
3. With E as centre and radius 8.3 cm, draw an arc, intersecting ray EX at point P.
4. Join P and F.
5. Draw the perpendicular bisector of seg PF, intersecting seg EP at point D.
6. Join D and F.
7. Hence, DEF is the required triangle.

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