312 I think, hop[e this helps
The interior angles of a triangle must add to 180 degrees.
110+5x+2x=180
110+7x=180
7x=70
x=10
Then plug in the x value into each angle expression
5(10)=50 degrees
2(10)=20 degrees
So if 123 x 47= 5781, 123 x 0.47= 57.81, why? because its exactly like dividing the number by 100, instead of dividing in the end, we divided one of the multipliers :)
A=9,805×(1+0.085×7÷12)
A=10,291.16
Rectangular area = l*b = 1620* 68 = 110160 cm² = 11.016 m²
