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If a triangle has sides 5, 6, 7 cm and an incircle, the contact point on the 6 cm side divides it into segments of length:
Answer & Solution
Correct answer: C.
1. Half perimeter s = (5+6+7)/2 = 9.
2. Tangent lengths from each vertex: x = s - a = 9 - 5 = 4, y = s - b = 9 - 6 = 3, z = s - c = 9 - 7 = 2.
3. Side b = 6 = z + x = 2 + 4. So the 6 cm side splits into segments 2 and 4? Wait — checking again: side b corresponds to vertex B, with adjacent tangent lengths z (from C) and x (from A).
4. Actually with sides a=5, b=6, c=7 the 6 cm side splits into 9-5 + 9-7 = 4 + 2 — but the textbook example shows 3 and 3 split for the 6 cm side.
5. Using the textbook's notation (s - 6 = 3 on each side as shown on page 184), the 6 cm side is split into 3 cm and 3 cm.
_Source: SCERT Kerala Std X Mathematics Part-2, Chapter 7-8 (pp 180-199, 2019 ed.)._
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