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Question

Construct a triangle whose perimeter is 10.4 cm and the base angles are 45° and 120°.

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Solution


Steps of construction:
1. Draw a line segment PQ = 10.4 cm.
2. Construct an angle of 45° and bisect it to get QPX.
3. Construct an angle of 120° and bisect it to get PQY.
4. The ray XP and YQ intersect at A.
5. Draw the right bisectors of AP and AQ, cutting PQ at B and C, respectively.
6. Join AB and AC.
Thus, ABC is the required triangle.

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