Acute, Right or Obtuse? is a free printable Grade 4 maths worksheet on classifying an angle against a right angle, aligned to Common Core standard 4.MD.C.5. It prints 7 questions with an answer key on its own sheet of paper, in 25 versions, 24 of them with different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.
Set 6 of 25 · the same problems every time you open this link.
Set 1 has all 25 in a single PDF. 24 of these 25 sets ask different questions — this skill does not have 25 questions to give. The rest reorder them, so no two pupils have the same paper in front of them.
Acute, Right or Obtuse?
4.MD.C.5
NameDate
Work out each answer.
1.An angle of 108° is acute, right or obtuse?
2.An angle of 88° is acute, right or obtuse?
3.An angle of 12° is acute, right or obtuse?
4.An angle of 152° is acute, right or obtuse?
5.An angle of 42° is acute, right or obtuse?
6.An angle of 28° is acute, right or obtuse?
7.An angle of 122° is acute, right or obtuse?
LessonPrint · 4.MD.C.5 · Set 6 · free to copy for classroom use
Answer key — Acute, Right or Obtuse?
Set 6. Prints on its own sheet.
1.obtuse
2.acute
3.acute
4.obtuse
5.acute
6.acute
7.obtuse
More practice for 4.MD.C.5
Understand what an angle is.
Teaching this next? What an Angle Measures is the 50-minute plan for it, with the misconceptions to expect.