ICSE Class X Math 2015 Solved Paper

Three vertices of a parallelogram ABCD taken in order are A(3,6),B(5,10) and C(3, 2) find:

Question : 8

Total: 52

length of diagonal BD.

Solution:

BD‌=√(5−1)2+(10+2)2
‌=√16+144
‌=√160
‌=4√10‌ units. ‌

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