22.In the picture,if ∠AOB=90º ,OD is the angular bisector of ∠BOC and OE is the angular bisector of ∠AOC, then ∠EOD=( ) (A) 30º (B) 45º (C) 50º (D) 60º 【查看更多】
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10、The bigest number in the set{3.2,2.3,3,2.23}is ( )
As shown in the diagram(如图),the triangle PQR has PR=14cm and PQ=10cm.The side RQ produced meets the perpendicular PS at S,so that QS=5cm.The perimeter(周长) of triangle PQR is