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Question

Draw a right triangle in which sides (other than hypotenuse) are of lengths 4 cm and 3 cm. Then, construct another triangle whose sides are 53 times the corresponding sides of the given triangle. [CBSE 2011]

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Solution

Steps of Construction

Step 1. Draw a line segment BC = 3 cm.

Step 2. At B, draw XBC = 90º.

Step 3. With B as centre and radius 4 cm, draw an arc cutting BX at A.

Step 4. Join AC. Thus, a right ∆ABC is obtained.

Step 5. Extend BC to D such that BD = 53BC = 53×3 cm = 5 cm.

Step 6. Draw DE || CA, cutting BX in E.



Here, ∆BDE is the required triangle similar to ∆ABC such that each side of ∆BDE is 53 times the corresponding side of ∆ABC.

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