S.3

예각·직각·둔각·평각

4분기 (4~6월)

각을 예각·직각·둔각·평각으로 분류하기 (어려움 단계는 180°보다 큰 각 포함)

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문제 수
Daniel Math Academy · Grade 4 Math

Acute, Right, Obtuse & Straight Angles

Skill S.3 · Lines & angles · ★★☆ Medium · Quarter 4

Name
 
Date
 
Score/ 6

Write acute (less than 90°), right (90°), obtuse (between 90° and 180°), or straight (180°).

Example
This angle isobtuse

Think: It opens wider than the corner of a square () but is not a straight line, so it is obtuse.

  1. 1
    180°
    This angle is 
  2. 2
    75°
    This angle is 
  3. 3
    72°
    This angle is 
  4. 4
    71°
    This angle is 
  5. 5
    180°
    This angle is 
  6. 6
    103°
    This angle is 
Daniel Math Academy · danielmath.comWorksheet #bi26bfx · Page 1 / 2
Daniel Math Academy · Grade 4 Math

Answer Key

S.3 Acute, Right, Obtuse & Straight Angles · ★★☆ Medium

  1. 1straight
  2. 2acute
  3. 3acute
  4. 4acute
  5. 5straight
  6. 6obtuse
Daniel Math Academy · danielmath.comWorksheet #bi26bfx · Answer Key · Page 2 / 2