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CBSE Class 9 Answered

only 1st n 3rd are in doubt
question image
Asked by Bhushan | 12 Oct, 2018, 04:51: PM
answered-by-expert Expert Answer
In ΔABC,
a2 + b2 = c2          ...(i)   Pythagoras theorem
According to the question,
a + b = √17  and c = 3
(a + b)2 = 17
a2 + 2ab + b2 = 17
c2 + 2ab = 17...........from (i)
32 + 2ab = 17
2ab = 17 - 9
2ab = 8
ab = 4
Area of triangle = begin mathsize 16px style 1 half ab equals 1 half cross times 4 equals 2 space square space units end style
Answered by Sneha shidid | 15 Oct, 2018, 10:07: AM

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