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### Grade 5 - Mathematics7.1 Measuring Angles

 When two rays meet at a common point called the vertex, an angle is formed. An angle that measures 90 degrees is called right angle. An angle that measures less than 90 degrees is an acute angle. An angle that measures more than 90 degrees is an obtuse angle. A straight line has an angle that measures 180 degrees. An angle that measures more than 180 degrees is reflex angle. If two angles add up to 1800 they are called supplementary angles. If two angles add up to 900 they are called complementary angles. Ruler is used to measure the lengths of segments and protractor is used to measure angles. Degree is the measure of angle. Directions: Answer the following questions. Also draw two rays meeting at a point and name its vertex and measure its angle.
 Q 1: Right angles are angles that are>90 degrees= 90 degrees<90 degrees Q 2: The ______ angles are greater than right angles.acuterightstraightobtuse Q 3: Acute angles are angles that are= 90 degrees>90 degrees<90 degrees Q 4: A normal intersection forms what type of intersecting lines?Perpendicular LinesParallel LinesStraight LinesFishing Lines Q 5: The angel EFG has a measure of 54 degrees. This angle is ________ angle.acuterightobtuse Q 6: To measure angles you would use aprotractorcompassruler Q 7: You measure an angle by measuring the size of its opening in degrees by placing the protractors center on the vertex of the angle and the zero mark along one ray.TrueFalse Q 8: A straight angle has a measure of90 degrees270 degrees180 degrees360 degrees Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!