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Question

Construct a right triangle whose base is 12 cm and sum of its hypotenuse and the third side is 18 cm. Find the length of the hypotenuse.

A
5 cm
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B
12 cm
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C
13 cm
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D
20 cm
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Solution

The correct option is C 13 cm
Steps to construct the required triangle are as follows :

Step 1: Draw the line segment AB of length 12 cm .Draw a ray AX making an angle 90 with the line segment AB.
Step 2: Cut a line segment AD of 18 cm ( as the sum of the other sides is 18) on the ray AX.
Step 3: Join DB.
Step 4: Construct perpendicular bisector MN of BD, intersecting the line AD at C. Join BC
Step 5: Then ΔABC is the required triangle.

Now, take a ruler a measure the length of BC (hypotenuse) which will be 13 cm.

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