plz give me answer of this simple method but I can't answer plz help
![](https://hi-static.z-dn.net/files/dec/3adea266c2e5ecf5c11d7be4ad972090.jpg)
Answers
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 :)
![](https://hi-static.z-dn.net/files/d5b/9645ddd3da1b6b33b9a101e4f1fcc4b1.jpg)
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