bc=16cm.af=14cm 求阴影面积
圆o是直角三角形abc的外接圆,角abc等于90度,弦bd=ba,ab=12,bc=5,be
0成交4366把川陆不锈钢量角器万能游标角度尺组合角尺0-180 0-320 0
540$150$1350$10000$1390$265$160$180$1200$300$550$655$600$1400hot
k(ψ)=kw61(kr61kw)√61cosψ(9)当9066ψ18066时k(ψ)=[kw
bc=16cm.af=14cm 求阴影面积
圆o是直角三角形abc的外接圆,角abc等于90度,弦bd=ba,ab=12,bc=5,be
0成交4366把川陆不锈钢量角器万能游标角度尺组合角尺0-180 0-320 0
540$150$1350$10000$1390$265$160$180$1200$300$550$655$600$1400hot
k(ψ)=kw61(kr61kw)√61cosψ(9)当9066ψ18066时k(ψ)=[kw