Question

下列說(shuō)法正確的是（　　）                                                                     

A．平角是一條直線     B．角的邊越長(zhǎng)，角越大                                       

C．大于直角的角叫做鈍角                              D．兩個(gè)銳角的和不一定是鈍角             

Answer 1

D                                

【考點(diǎn)】角的概念．                                                                          

【分析】直接利用角的定義以及鈍角的定義分別分析得出答案．                    

【解答】解：A、平角是兩條射線組成的一條直線，故此選項(xiàng)錯(cuò)誤；              

B、角的邊越長(zhǎng)，與角的大小無(wú)關(guān)，故此選項(xiàng)錯(cuò)誤；                                       

C、大于直角且小于180°的角叫做鈍角，故此選項(xiàng)錯(cuò)誤；                               

D、兩個(gè)銳角的和不一定是鈍角，正確．                                                 

故選：D．                                                                                         

【點(diǎn)評(píng)】此題主要考查了角的定義以及鈍角的定義，正確把握定義是解題關(guān)鍵．