<div style="text-align: center;"><strong><font color="#ff0000">2016年人教版小学四年级数学上册第三单元测试卷</font></strong></div><br><span><strong>一、填空题。</strong></span><br><br><span>1.</span><span>线段有</span><span>(</span><span> </span><span>)</span><span>个端点</span><span>,</span><span>射线有</span><span>(</span><span> </span><span>)</span><span>个端点。</span><br><br><span>2.</span><span>(</span><span> </span><span>)</span><span>角小于</span><span>90°</span><span>,</span><span>大于</span><span>90°</span><span>而小于</span><span>180°</span><span>的角叫做</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><span>3.</span><span>1</span><span>平角</span><span>=</span><span>(</span><span> </span><span>)</span><span>直角</span><span> </span><span>1</span><span>周角</span><span>=</span><span>(</span><span> </span><span>)</span><span>直角</span><span> </span><span>1</span><span>周角</span><span>=</span><span>(</span><span> </span><span>)</span><span>平角</span><span> </span><br><br><span>4.</span><span>下图中</span><span>,</span><span>∠</span><span>1</span><span>与</span><span>∠</span><span>2</span><span>组成的角是</span><span>(</span><span> </span><span>)</span><span>角</span><span>,</span><span>已知</span><span>∠</span><span>1=40°</span><span>,</span><span>那么</span><span>∠</span><span>2=</span><span>(</span><span> </span><span>)</span><span>。 </span><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/2016930141753.png?m=0.7732279030901228"><br><br><span>5.</span><span>在时钟上</span><span>,</span><span>时针与分针成</span><span>90°</span><span>是</span><span>(</span><span> </span><span>)</span><span>时与</span><span>(</span><span> </span><span>)</span><span>时</span><span>;</span><span>时针和分针形成平角的时刻是</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><span><strong>二、写出下面用三角尺拼出的角的度数。</strong></span><br><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/2016930141834.png?m=0.940484448875373"><br><strong><br><span>三、选择题。</span><span>(</span><span>在括号里填上正确答案的序号</span><span>)</span><span> </span></strong><br><br><span>1.</span><span>过一点可以画</span><span>(</span><span> </span><span>)</span><span>条射线。</span><br><br><span>A.</span><span>1 </span><span> </span><span>B.</span><span>2 </span><span> </span><span>C.</span><span>3 </span><span> </span><span>D.</span><span>无数</span><br><br><span>2.</span><span>角的两条边是两条</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><span>A.</span><span>直线</span><span></span><span>B.</span><span>射线</span><span></span><span> </span><span>C.</span><span>线段</span><span></span><span>D.</span><span>曲线</span><br><br><span>3.9</span><span>:</span><span>30</span><span>,</span><span>时针与分针形成的角是</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><span>A.</span><span>锐角</span><span></span><span>B.</span><span>直角</span><span></span><span> </span><span>C.</span><span>钝角</span><span></span><span>D.</span><span>平角</span><br><br><span>4.</span><span>在一个</span><span>5</span><span>倍的放大镜下看一个</span><span>5°</span><span>的角</span><span>,</span><span>看到的角是</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><span>A.</span><span> </span><span>5°</span><span> </span><span></span><span>B.</span><span> </span><span>25°</span><span> </span><span> </span><span>C.30°</span><span></span><span>D.</span><span> </span><span>45°</span><br><br><span>5.</span><span>可以测出长度的是</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><span>A.</span><span>直线</span><span> </span><span> </span><span>B.</span><span>射线</span><span> </span><span> </span><span>C.</span><span>线段</span><span> </span><span> </span><span>D.</span><span>角的边</span><br><br><span><strong>四、给下面的角分类。</strong></span><br><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/2016930142012.png?m=0.8381484472644947"><br><br><strong><span>五、先量一量</span><span>,</span><span>再在</span></strong><strong>○</strong><strong><span>里填上“</span><span>></span><span>”或“</span><span><</span><span>”。</span></strong><br><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/201693014213.png?m=0.4904035341177646"><br><br><span><strong>六、量出时针与分针所成的角度。</strong></span><br><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/2016930142237.png?m=0.7162546575276638"><br><strong><br><span>七、按要求画一画。</span></strong><br><br><span>1.</span><span>以</span><em><span>A</span></em><span>点为顶点画一个</span><span>50°</span><span>的角</span><span>,</span><span>并在角的一边上截一条</span><span>3</span><span>厘米长的线段。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/2016930142330.png?m=0.5414149277754534"><br><br><span>2.</span><span>用合适的方法画出下面度数的角。</span><br><br><span>135° 110° 72°</span><br><br><span><strong>八、看图填一填。</strong></span><br><br><span>图中有</span><span>(</span><span> </span><span>)</span><span>条射线</span><span>,(</span><span> </span><span>)</span><span>个角</span><span>,</span><span>其中有</span><span>(</span><span> </span><span>)</span><span>个直角</span><span>,(</span><span> </span><span>)</span><span>个锐角</span><span>,(</span><span> </span><span>)</span><span>个钝角。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/2016930142415.png?m=0.2602388357897758"><br><strong><br><span>九、看图计算。</span></strong><br><br><span>1.</span><span>已知</span><span>∠</span><span>1=35°</span><span>,</span><span>那么</span><span>∠</span><span>2=</span><span>(</span><span> </span><span>),</span><span>∠</span><span>3=</span><span>(</span><span> </span><span>),</span><span>∠</span><span>4=</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><span><img src="//www.szxuexiao.com/uploadimages/2016/0930/2016930142551.png?m=0.7619137721122597"> </span><br><br><span>2.</span><span>已知</span><span>∠</span><span>1=65°</span><span>,</span><span>那么</span><span>∠</span><span>2=</span><span>(</span><span> </span><span>),</span><span>∠</span><span>3=</span><span>(</span><span> </span><span>),</span><span>∠</span><span>4=</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/201693014272.png?m=0.44842602282413857"><br><br><span>3.</span><span>已知</span><span>∠</span><span>1=30°</span><span>,</span><span>那么</span><span>∠</span><span>2=</span><span>(</span><span> </span><span>),</span><span>∠</span><span>3=</span><span>(</span><span> </span><span>),</span><span>∠</span><span>4=</span><span>(</span><span> </span><span>)</span><span>。</span><br><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/2016930142742.png?m=0.6356541510208917"><br><br><strong><span>十、三个正方形的摆放如下图</span><span>,</span><span>已知</span><span>∠</span><span>2=30°</span><span>,</span><span>∠</span><span>3=45°</span><span>,</span><span>求</span><span>∠</span><span>1</span><span>。</span></strong><br><br><img src="//www.szxuexiao.com/uploadimages/2016/0930/2016930142819.png?m=0.497324480740035"><br><br><br><div style="text-align: center;"><strong><font color="#38761d">2016年人教版小学四年级数学上册第三单元测试卷参考答案</font></strong></div><br><span>一、</span><span>1</span><span>.</span><span> </span><span>2 1 </span><span>2</span><span>.</span><span>锐</span><span> </span><span>钝角</span><span> </span><span>3</span><span>.</span><span> </span><span>2 4 2 </span><span>4</span><span>.</span><span>平</span><span> 140°</span><span> </span><span>5</span><span>.</span><span> </span><span>3 9 6</span><span>时</span><br><br><span>二、</span><span>105° 120° 75°</span><br><br><span>三、</span><span>1</span><span>.</span><span> </span><span>D </span><span>2</span><span>.</span><span> </span><span>B </span><span>3</span><span>.</span><span> </span><span>C </span><span>4</span><span>.</span><span> </span><span>A </span><span>5</span><span>.</span><span> </span><span>C</span><br><br><span>四、</span><span>锐角</span><span>:</span><span> </span><span>24° 89° 2° 75°</span><br><br><span>直角</span><span>:</span><span>90°</span><br><br><span>钝角</span><span>:</span><span>93° 100° 121°</span><br><br><span>五、</span><span>30°<100° 80°<130°</span><br><br><span>六、</span><span>120° 60° 90°</span><br><br><span>七、</span><span>略</span><br><br><span>八、</span><span>4 6 2 3 1</span><br><br><span>九、</span><span>1</span><span>.</span><span> </span><span>145° 35° 145°</span><br><br><span>2</span><span>.</span><span> </span><span>25° 115° 65°</span><br><br><span>3</span><span>.</span><span> </span><span>30° 60° 60°</span><br><br><span>十、</span><span>15°</span><br><br><br>
四年级上