2D shapes exercise for Grade 4 / Year 5 - Free Printable

Let's solve each question step by step and provide explanations.

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Q1) Name the following 2D shapes.

We are given 10 colored 2D shapes. Let’s identify each one:

1. Yellow circle → Circle
(A round shape with no sides or corners)

2. Blue triangle → Triangle
(3 sides, 3 angles)

3. Green square → Square
(4 equal sides, 4 right angles)

4. Red rectangle → Rectangle
(4 sides, opposite sides equal, 4 right angles)

5. Green trapezoid → Trapezoid
(Quadrilateral with one pair of parallel sides)

6. Purple rhombus → Rhombus
(All sides equal, opposite angles equal)

7. Orange pentagon → Pentagon
(5 sides)

8. Brown hexagon → Hexagon
(6 sides)

9. Purple heptagon → Heptagon
(7 sides)

10. Yellow octagon → Octagon
(8 sides)

11. Green diamond-shaped figure → Rhombus or Kite?
But since it has two pairs of adjacent equal sides and looks like a tilted square, it's more likely a Rhombus (but could be a kite). However, in standard classification, if all four sides are equal, it's a rhombus.
So: Rhombus

> ✔ Final Answers for Q1:
> 1. Circle
> 2. Triangle
> 3. Square
> 4. Rectangle
> 5. Trapezoid
> 6. Rhombus
> 7. Pentagon
> 8. Hexagon
> 9. Heptagon
> 10. Octagon
> 11. Rhombus

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Q2) Name the following type of angles.

We are given three angles with their measures.

a) 135° → This is greater than 90° but less than 180°, so it is an Obtuse angle

b) 90° → This is exactly 90 degrees, so it is a Right angle

c) 60° → This is less than 90°, so it is an Acute angle

> ✔ Final Answers for Q2:
> a) Obtuse angle
> b) Right angle
> c) Acute angle

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Q3) Find the number of acute angles, right angles, and obtuse angles for the shape given below.

The shape is a pentagon that looks like a house with a triangular roof on top of a rectangle.

Let’s analyze the angles:

- The shape has 5 vertices (corners).
- We are to count:
- Acute angles: angles < 90°
- Right angles: angles = 90°
- Obtuse angles: angles > 90° but < 180°

Now, look at the diagram:

- Two right angles are marked with small squares (at the bottom left and bottom right), so those are 90° → 2 right angles
- At the top point (the peak of the roof), the angle is pointy and less than 90° → acute angle
- The two side angles (on the slanted sides) are greater than 90° → obtuse angles

So:

- Acute angles: 1 (top vertex)
- Right angles: 2 (bottom corners)
- Obtuse angles: 2 (the two slanted side angles)

> ✔ Final Answers for Q3:
> - 1 Acute angle
> - 2 Right angles
> - 2 Obtuse angles

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✔ Summary of Answers:

#### Q1: Shapes
1. Circle
2. Triangle
3. Square
4. Rectangle
5. Trapezoid
6. Rhombus
7. Pentagon
8. Hexagon
9. Heptagon
10. Octagon
11. Rhombus

#### Q2: Angles
a) Obtuse angle
b) Right angle
c) Acute angle

#### Q3: Count angles
- Acute angles: 1
- Right angles: 2
- Obtuse angles: 2

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Let me know if you'd like this formatted as a printable answer sheet!