將長度和角度精度設(shè)置為小數(shù)點(diǎn)后三位,繪制以下圖形,B點(diǎn)為邊AC的中點(diǎn),求內(nèi)切圓半徑R:()。
A.15.538 B.17.838 C.16.789 D.19.478
將長度和角度精度設(shè)置為小數(shù)點(diǎn)后三位,繪制以下圖形,陰影面積、周長:()。
A.11744.468,766.606 B.12814.468,660.606 C.11688.468,756.606 D.11614.468,760.606
將長度和角度精度設(shè)置為小數(shù)點(diǎn)后三位,繪制以下圖形,點(diǎn)A坐標(biāo)為:()。
A.(41.078,30.000) B.(50.078,40.472) C.(46.078,36.000) D.(56.078,47.048)