1.

30.Angles of a triangleare(5x+4), (x-2) and (3x+7). Find all the angles of a triangle​

Answer»

Step-by-step explanation:

Sum of 3 ANGLES of a triangle should be equal to 180°

So , sum of (2x-30°) , (3x-40°) and (5/2+10°) should be 180°

(2x-30) + (3x-40) + (5/2+10) = 180

5x - 30 - 40 + 10 + 5/2 = 180

5x - 60 + 5/2 = 180

5x = 180 + 60 - 5/2

5x = 240 - 5/2

5x = 475/2

x = 95/2

x = 47.5

Now the 3 ANGLE of triangle are :

(2x-30) = 2*47.5 - 30 = 65°

(3x-40) = 3*47.5 - 40 = 102.5°

(5/2+10) = 12.5°


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