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Question

Construct a triangle ABC in which BC is 5 cm, Angle B is 120 and AB+AC=17cm [3 MARKS]

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Solution

Steps : 1 Mark
Construction : 2 Marks

Steps:
1. Draw line segment BC of length 5 cm using ruler.
2. From B, draw a ray BX which makes an angle of 120 with BC.
3. Cut a line segment BD equal to AB+AC=17 cm on ray BX.
4. Join CD. Construct perpendicular bisector PQ for CD. Let PQ meet BD at A.
5. Join AC. Triangle ABC is the required triangle.

q 69


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