Question

Find the value of x in a given figure​

Answer 1

Step-by-step explanation:

x = 28°

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Answer 2

Answer:

Step-by-step explanation:

We know that sum of all the tree sides in a triangle is equal to 180°

So :  ∠A + ∠B  + ∠ C = 180°

So :  5x - 60° + 2x + 40° + 3x - 80° = 180°

5x - 60° + 2x + 40° + 3x - 80° = 180°

10x -20° - 80° = 180°

10x - 100° = 180°

10x = 180° + 100°

10x = 280

x= 280/10

x = 28°

verification :  5x - 60° + 2x + 40° + 3x - 80° = 180°

5 (28) - 60 + 2 (28) + 40 + 3 (28) - 80 = 180

140 - 60 + 56 + 40 + 84 - 80 = 180

80 + 96 + 4 = 180

180 = 180

Hence proved .

verification is only to verify our answer to ckeck wheter it is wrong or right .

In this case LHS = RHS , so our  answer is correct ,  if LHS ≠ RHS , then our answer is wrong.

So in exams and all you don't want to verify like this