Understanding Elementary Shapes

Exercise 5.3

Questions with (*) sign are open-ended questions.

1). Match the following:
(i) Straight angle              a). less than one-fourth of a revolution
(ii) Right angle                 b). More than half a revolution
(iii) Acute angle                c). Half of a revolution
(iv) Obtuse angle             d). One-fourth of a revolution
(v) Reflex angle               e). between ¼ and ½ of a revolution
                                      f). One complete revolution
Answer:
(i) Straight angle – Half of a revolution
(ii) Right angle – One-fourth of a revolution
(iii) Acute angle – less than one-fourth of a revolution
(iv) Obtuse angle – between ¼ and ½ of a revolution
(v) Reflex angle – More than half a revolution

2). Classify each one of the following angles as right, straight, acute, obtuse or reflex.

 

 

Answers:

 

 

 

 

 

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