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先計算圓的直徑(三角形的斜邊):25.12÷3.14=8(釐米); 再計算等腰直角三角形兩個等腰邊:8÷1.41·42=5.657(釐米); 最後計算三角形面積:5.657×5.657×1/2=16(平方釐米). 答:三角形面積是16平方釐米.
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