A trapezoid has one base of 8 ft, a height of 3 ft, and an area of 30 ft2. What is the length of the other base?

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问题 A trapezoid has one base of 8 ft, a height of 3 ft, and an area of 30 ft². What is the length of the other base?

选项

答案12 ft

解析 The equation for the area of a trapezoid is A = 1/2(base₁+ base₂)(height). Substitute the given variables into the equation and solve for the missing base:
30=1/2(8 + base₂)(3)
20 =(8 + base₂)
base₂ = 12 ft

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本试题收录于： GRE QUANTITATIVE题库GRE分类

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A trapezoid has one base of 8 ft, a height of 3 ft, and an area of 30 ft2. What is the length of the other base?

GRE QUANTITATIVE

GRE

ThefirstyearofschoolinAmerica,knownaskindergarten,usuallybeginsbetweentheagesoffiveandsix.Amongrichcountrie

AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair

AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair

Whatisthelengthofthehypotenuseof△ABC?(1)Thelengthsofthethreesidesof△ABCareconsecutiveevenintegers.(2)The

Inthefigureabove，PQisadiameterofcircleO，PR=SQ，and△RSTisequilateral．IfthelengthofPQis2．whatisthelengthofRT

Isthequadrangleasquare?(1)Thesumofthreeinterioranglesis270.(2)Threesidesofthequadrangleequals.

Thephysicalstructureofthehumaneyeenablesittosenselightofwavelengthsupto0.0005millimeters;infraredradiation,h

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Youareapplyingfertilizertoyourbackyard.Therectangularyardmeasures40feetwideand70feetlong.Youuse6poundsoff

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