NCERT Solutions Class 6 Mathematics Understanding Elementary Ex 5.3 Class 6 - Mathematics : Understanding ElementaryExercise : 5.3 Top Block 1 Question: 1.Match the following: Column A Column B 1. Straight angle A. less than one-fourth a revolution 2. Right angle B. more than half a revolution 3. Acute angle C. half of a revolution 4. Obtuse angle D. one-fourth a revolution 5. Reflex angle E. between ¼ and ½ of a revolution F. one complete revolution Answer : Column A Column B 1. Straight angle C. half of a revolution 2. Right angle D. one-fourth a revolution 3. Acute angle A. less than one-fourth a revolution 4. Obtuse angle E. between ¼ and ½ of a revolution 5. Reflex angle B. more than half a revolution Question: 2.Classify each one of the following angles as right, straight, acute, obtuse or refles: Mddle block 1 Answer : (a) Acute angle (b) Obtuse angle (c) Right angle (d) Reflex angle (e) Straight angle (f) Acute angle Bottom Block 3