Math, asked by subsubkingbro, 5 hours ago

plz give me answer of this simple method but I can't answer plz help​

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Answers

Answered by ibpatel1313
1

Step-by-step explanation:

A + B + C = 180 (angle sum property)

-> B = 180 - (60+105)

-> B = 15°

Now, we have a rule that the measurement of an angle is directly proportional to the opposite side.

Like angle A is directly proportional to its opposite side BC.

We use this formula to cross multiply and find for other two angles.

-> For 60°, opp side(BC) = 3m (given)

-> For 105°, opp side(AB) = 105*3 / 60 (cross multiplication)

= 4.24m

-> For 15°, opp side(AC) = 15*3 /60

= 0.75m

-> Perimeter of triangle = side + side + side

= 3 + 4.24 + 0.75

= 7.99 m

[ANS: 7.99m]

Please check if that's correct. Hope it helps :)

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Answered by bhanuprakash814379
1

the angles given are 105°and 60°

so the other angle is 15°

Now,

accoring to law of sines

a/SinA = b/SinB = c/SinC

Then,

a/sin 15 = b/sin 105 = 3/sin 60

a/0.65 = b/0.96 = 3/0.86

a/0.65 = 3/0.86

a = 3×0.65/0.86

a =1.95

b/0.96 = 3/0.86

b = 3×0.96/0.86

b = 3.34

perimeter = a+b+c

= 1.95 + 3.34 + 3

= 8.29 m

Not sure about the answer. Gave a try. hope this helps

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