If the diameter is 4 cm.. then that would mean the radius is 2cmbecause the radius is half of the diameter. So, we already know the radius.. we just have to find the circumference.
Circumference formula:(C=πd)or(C=2πr)
Finding the circumference : 3.14 × 4 = 12.56 cm
So, we now have the radius and circumference.
Radius = 2 cm
Circumference = 12.56 cm
Finding the Area : 3.14 × 2 × 2 = 12.56 cm²
So, 12.56 rounded to the nearest tenth is 12.6 cm².
Area of triangle=1/2(base×height) 360=1/2((4x-2)(7x+5)) 720=(4x-2)(7x+5) FOIL the binomial 720=28x^2+6x-10 Bring 720 to the other side 28x^2+6x-10-720=0 28x^2+6x-730=0 Factor 2 out 2(14x^2+3x-365)=0 Factor 2(14x+73)(x-5)=0 x-5=0 x=5 It can't be 14x-73=0 because the length can't be negative. You're welcome.
