1st Grade 2D and 3D Shapes Worksheet Solutions (PDF)
This shapes practice solutions for 1st Grade covers 2d and 3d shapes (Common Core 1.G.A.1, 1.G.A.2), with a free PDF to print.
This answer key explains all 20 shape problems. Check the number of sides and corners first. Then check the name. Fix any mistake and try the problem again.
Grade 1 · Common Core State Standards: 1.G.A.1, 1.G.A.2
Shapes practice solutions: exercises 1 to 10
Exercise 1 – Name the shape
It has 3 sides and 3 corners.
Triangle
Exercise 2 – Count the corners
A circle is round. It has no corners.
0 corners
Exercise 3 – Equal sides
The shape has 4 sides. All the sides are the same length.
4 sides, yes
Exercise 4 – Sides and corners
Count the sides: 1, 2, 3, 4. Count the corners: 1, 2, 3, 4.
4 sides and 4 corners
Exercise 5 – Different triangles
Each triangle has 3 sides, even when it is big, small, or turned.
3, 3, 3
Exercise 6 – Upside down
Turning a shape does not change its sides or corners.
True
Exercise 7 – Big and small
Size does not change a defining attribute.
True
Exercise 8 – Name a 3D shape
It has 6 flat faces, and each face is a square.
Cube
Exercise 9 – Name a rolling shape
It has 2 flat circles and a curved side.
Cylinder
Exercise 10 – Name a pointed shape
It has 1 flat circle and one point.
Cone
Exercises 11 and up
Exercise 11 – Count the flat faces
Top, bottom, front, back, left, and right make 6 faces.
6 flat faces
Exercise 12 – Find the cylinder
Shape A has 6 flat faces. Shape C has 1 flat circle and a point. Shape B has 2 flat circles.
B
Exercise 13 – Color does not matter
Sides and corners are defining attributes. Color is not.
The color pink
Exercise 14 – Join two triangles
The new shape has 4 equal sides and 4 corners.
A square
Exercise 15 – Join two squares
The new shape has 4 sides and 4 corners. Two sides are longer than the other two.
A rectangle
Exercise 16 – Four small squares
All the sides of the big shape are the same length.
A square with 4 sides
Exercise 17 – Soup can
The can is a cylinder. It has a flat circle on the top and a flat circle on the bottom.
Cylinder, 2 flat faces
Exercise 18 – Mystery block
Six square faces make a cube.
A cube
Exercise 19 – Corners in all
The triangle has 3 corners. Each square has 4 corners, so two squares have \(4 + 4 = 8\). Then \(3 + 8 = 11\).
11 corners
Exercise 20 – Shape picture
- Triangle
- 4 sides
- \(1 + 1 = 2\). 2 shapes
Key facts behind this shapes practice solutions
- A triangle has 3 sides and 3 corners.
- A square has 4 sides that are all the same length. A rectangle has 4 sides and 4 corners.
- Color, size, and turning do not change the name of a shape.
- A cube has 6 flat faces. A cylinder has 2. A cone has 1.
- Two shapes can be put together to make a new shape.
How to use this shapes practice solutions
Cover each solution, solve the exercise again, then uncover it and compare every line. If your answer differs, find the first step that changed and redo the exercise from there.
All Grade 1 chapters: Grade 1 math.
