2D vs 3D Shapes

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2D vs 3D Shapes · Grade 1 · Worksheet 3

1. Which shape can you stack like blocks? Answer: C. Cube Solution: A triangle is flat and cannot be stacked like blocks A circle is flat and cannot be stacked like blocks A cube is a solid shape that can be stacked like blocks A square is flat and cannot be stacked like blocks The correct answer is Cube.
   Full step-by-step solution

   Step 1: A triangle is flat and cannot be stacked like blocks Step 2: A circle is flat and cannot be stacked like blocks Step 3: A cube is a solid shape that can be stacked like blocks Step 4: A square is flat and cannot be stacked like blocks The correct answer is Cube.

2. Which shape can you hold in your hand like a ball? Answer: D. Sphere Solution: A triangle is a flat shape with 3 sides A square is a flat shape with 4 equal sides Since a ball is a solid object you can hold, the correct answer is Sphere.
   Full step-by-step solution

   Step 1: A triangle is a flat shape with 3 sides Step 2: A square is a flat shape with 4 equal sides Step 3: A sphere is a round, solid shape like a ball Step 4: A circle is a flat, round shape Since a ball is a solid object you can hold, the correct answer is Sphere.

3. Tane has a toy that is shaped like a ball. He can roll it on the ground. Is the toy a 2D shape or a 3D shape? Answer: 3D shape Solution: A 2D shape is flat, like a circle drawn on paper. A 3D shape is solid and takes up space, like a real ball you can hold and roll.
   Full step-by-step solution

   Step 1: A 2D shape is flat, like a circle drawn on paper. A 3D shape is solid and takes up space, like a real ball you can hold and roll. Step 2: Tane's toy is shaped like a ball and he can roll it on the ground, so it is not flat. Step 3: Therefore, the toy is a 3D shape. The correct answer is 3D shape.

4. A rectangular prism has a length of 80 cm, a width of 50 cm, and a height of 60 cm. Which of these shapes is a rectangular prism? Answer: A. A shape with 6 rectangular faces where opposite faces are equal Solution: A rectangular prism is a 3D shape with 6 faces that are all rectangles Option A describes a shape with triangular faces, which would be a triangular pyramid Option B correctly describes a rectangular prism with 6 rectangular faces where opposite faces are equal Option D describes a square…
   Full step-by-step solution

   Step 1: A rectangular prism is a 3D shape with 6 faces that are all rectangles Step 2: Option A describes a shape with triangular faces, which would be a triangular pyramid Step 3: Option B correctly describes a rectangular prism with 6 rectangular faces where opposite faces are equal Step 4: Option C describes a cylinder with circular bases Step 5: Option D describes a square pyramid with triangular sides The correct answer is A shape with 6 rectangular faces where opposite faces are equal.

5. Hana is playing with her toys. She picks up a shape that is round like a ball, but when she puts it on a piece of paper and traces around it, the drawing is a flat circle. Is the ball a 2D shape or a 3D shape? Answer: 3D shape Solution: A 2D shape is flat and can be drawn on paper. A circle is a 2D shape because it is flat. A 3D shape is solid and takes up space.
   Full step-by-step solution

   Step 1: A 2D shape is flat and can be drawn on paper. A circle is a 2D shape because it is flat. Step 2: A 3D shape is solid and takes up space. A ball is round and you can hold it, roll it, and it is not flat. Step 3: The ball is a 3D shape, even though the tracing of it makes a flat 2D circle. Final answer: The ball is a 3D shape.