Centimeters 6596

The jewelry box is in the shape of a four-sided prism with the base of an isosceles trapezoid with sides a=15 centimeters, b is equal to 9 centimeters, c is equal to 10 centimeters, c is equal to 7 whole 4 centimeters. How much fabric is needed to cover a jewelry box if its height is 7 centimeters?

Correct answer:

S =  474.8071 cm2

Step-by-step explanation:

a=15 cm b=9 cm c=10 cm v=7.4 cm h=7 cm  S1=(a+c) v/2=(15+10) 7.4/2=2185=92.5 cm2  a1=b2v2=927.425.1225 cm a2=a(c+a1)=15(10+5.1225)0.1225 cm  d=a22+v2=(0.1225)2+7.427.401 cm o=a+b+c+d=15+9+10+7.40141.401 cm  S=2 S1+o h=2 92.5+41.401 7=474.8071 cm2



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