Question

If ABCD is a quadrilateral,

Is AB + BC + CD + DA > AC + BD ?​

Answer 1

Answer:

ABCD is a quadrilateral and AC, and BD are the diagonals.

Sum of the two sides of a triangle is greater than the third side.

So, considering the triangle ABC, BCD, CAD and BAD, we get

AB + BC > AC

CD + AD > AC

AB + AD > BD

BC + CD > BD

Adding all the above equations,

2(AB + BC + CA + AD) > 2(AC + BD)

⇒ 2(AB + BC + CA + AD) > 2(AC + BD)

⇒ (AB + BC + CA + AD) > (AC + BD)

Answer 2

Answer:

yes

because a diagonal divides a quadrilateral into 2 triangles and sum of 2 sides of a triangle is greater than third side

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