Answer:
Angle B = 24°
Explanation:
Given:
- Angles are supplementary
- Angle A is 5 times the sum of angle B plus 7.2
that means, Angle A = 5 ( Angle B + 7.2 )
Now,
Let Angle B = x (say)
•.• Angle A = 5 ( x + 7.2 )
- Supplementary angles are a pair of angles that make sum of 180° .
Therefore, As it is given that the angles are supplementary , the sum of Angle A and Angle B will be equal to 180°.
Angle A + Angle B = 180°






Now, substituting the value of x. . .
- Angle B = 24°
- Angle A = 5( 24+ 7.2 ) = 5( 31.2 ) = 156°
Thus, Angle B comes out 24°