Question

A section in a stained glass window is shaped like a trapezoid. The top base is 1 centimeter and the bottom base is 3.5 centimeters long. If the area of the section of glass is 8.1 square centimeters, how tall is the section?

Answer 1

I don't know if it's right but this is what I did. the rounding might be a little different.


$(1 + 3.5) \div 2 \times x = 8.1$
$4.5 \div 2 = 2.3$
$2.3x = 8.1$
$8.1 \div 2.3 = 3.5$
x=3.5 cm.