Question

7. In the following figure two triangles are shown as following. Find the value of ∆A+∆B+∆c+∆f+∆d+∆E ​

Answer 1

Answer:

Find the face value of the digits in the following numbers. Also find the place value of the digits in both in Indian and the International systems. a 9 in 9875612

tell the indian system how to write this In indian system and international system

Answer 2

Answer:

Solution

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We know that the sum of all the angles in triangle ACE is 180

∘

.

∠A+∠C+∠E=180

∘

..(1)

We know that the sum of all the angles in triangle BDF is 180

∘

.

∠B+∠D+∠F=180

∘

..(2)

Now by adding both equations (1) and (2) we get

∠A+∠C+∠E+∠B+∠D+∠F=180

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+180

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On further calculation

∠A+∠B+∠C+∠D+∠E+∠F=360

∘

Therefore, it is proved that ∠A+∠B+∠C+∠D+∠E+∠F=360