Types of angle interactive worksheet - Free Printable

Let’s go through each angle one by one and figure out what type it is.

We know:
- Acute angle = less than 90° (small, sharp)
- Right angle = exactly 90° (looks like the corner of a square — often marked with a little box)
- Obtuse angle = more than 90° but less than 180° (wide, open)
- Straight angle = exactly 180° (looks like a straight line)

Now let’s look at each number:

---

1) The angle looks small — definitely less than 90°. → Acute

2) There’s a little square in the corner — that means it’s exactly 90°. → Right

3) This angle is wide — bigger than 90°, but not a straight line. → Obtuse

4) Again, this is a small angle — less than 90°. → Acute

5) Little square again — 90°. → Right

6) Small angle — less than 90°. → Acute

7) Wide angle — more than 90°, not straight. → Obtuse

8) Looks like an upside-down “V” — still less than 90°. → Acute

9) Wide angle — more than 90°. → Obtuse

10) Even though there’s a dotted arc, the actual angle shown is less than 90°. → Acute

11) This is a straight line with a half-circle over it — that’s 180°. → Straight

12) Little square — 90°. → Right

---

Final Answer:
1) Acute
2) Right
3) Obtuse
4) Acute
5) Right
6) Acute
7) Obtuse
8) Acute
9) Obtuse
10) Acute
11) Straight
12) Right