square kilometers
radius
area
其他相關(guān)：
有關(guān)數(shù)學(xué)運(yùn)算
add,plus加?subtract減?difference差?multiply,times乘?product積?divide除?divisible可被整除的?dividedevenly被整除?dividend被除數(shù),紅利?divisor因子,除數(shù)?quotient商?remainder余數(shù)?factorial階乘?power乘方?radicalsign,rootsign根號?roundto四舍五入?tothenearest四舍五入
有關(guān)分?jǐn)?shù)和小數(shù)
proper fraction真分?jǐn)?shù)?improper fraction假分?jǐn)?shù)?mixed number帶分?jǐn)?shù)?vulgar fraction,common fraction普通分?jǐn)?shù)?simple fraction簡分?jǐn)?shù)?numerator分子?denominator分母?(least)common denominator（最?。┕帜?quarter四分之一?
decimal fraction純小數(shù)?infinite decimal無窮小數(shù)?
recurring decimal循環(huán)小數(shù)?
round off四舍五入?
幾何部分
acute angle銳角?obtuse angle鈍角?right angle直角?round angle周角?straight angle平角?
equilateral triangle等邊三角形?isosceles triangle等腰三角形?right triangle直角三角形
quadrilateral四邊形parallelogram平行四邊形?equilateral等邊形?plane平面?square正方形,平方?rectangle長方形?regular polygon正多邊形?rhombus菱形?trapezoid梯形?
line,straight line直線?line segment線段?parallel lines平行線?