Dimensions of the trapezoid

One of the trapezoid bases is one-fifth larger than its height, and the second base is 1 cm larger than its height. Find the dimensions of the trapezoid if its area is 115 cm2

Correct answer:

a =  12 cm
c =  11 cm
h =  10 cm

Step-by-step explanation:

a = h + h/5 c = 1 + h S=115 cm2  S = 2a+c h 2 S=((h+h/5)+(1+h)) h  2 115=((h+h/5)+(1+h)) h 2.2h2h+230=0 2.2h2+h230=0  a=2.2;b=1;c=230 D=b24ac=1242.2(230)=2025 D>0  h1,2=2ab±D=4.41±2025 h1,2=0.227273±10.227273 h1=10 h2=10.454545455  h=h1=10 cm  a=h+h/5=10+10/5=12 cm

Our quadratic equation calculator calculates it.

c=1+h=1+10=11 cm
h=10 cm   Verifying Solution:   S1=2a+c h=212+11 10=115 cm2

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