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Daniel Math Academy · Grade 5 Math

Triangle Angles & Classification

Skill S.6 · Triangles · ★★☆ Medium · Quarter 4

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A triangle's angles add up to 180°. A square marks a 90° angle; ticks mark equal sides.

1. 1
   Find the missing angle. Acute, right, or obtuse? 
2. 2
   Find the missing angle. Acute, right, or obtuse? 
3. 3
   Find the missing angle. Acute, right, or obtuse? 
4. 4
   Find the missing angle. Acute, right, or obtuse? 
5. 5
   Find the missing angle. Acute, right, or obtuse? 
6. 6
   Find the missing angle. Acute, right, or obtuse? 

Daniel Math Academy · Grade 5 Math

Answer Key

S.6 Triangle Angles & Classification · ★★☆ Medium

1. 1$26^{\circ }$, acute
2. 2$136^{\circ }$, obtuse
3. 3$39^{\circ }$, acute
4. 4$21^{\circ }$, obtuse
5. 5$26^{\circ }$, obtuse
6. 6$90^{\circ }$, right