Circles, squares, triangles

Compare flat outlines and join shapes to make a new whole.

Paper packet. Every task here also exists on screen, where it is checked automatically; answers written on paper are not assessed by Nydus. When you are back at a device, enter your answers there.

1. What you will learn

Use edges and corners to name shapes and see what joined pieces make.

2. Words to hear

Term	What it means
Side	A straight part of an outline.
Outline	The outside edge of a shape.

3. Follow the outline

A circle has a round edge and no corners. A triangle has three straight sides. A square has four equal sides and four square corners. A rectangle has four square corners too. Some rectangles have two long sides and two short sides. A square is also a special rectangle. Look at the edge, not the color.

Another way: picture

○ circle △ triangle □ square

4. Make a new whole

Two equal squares touch along a full side. Their combined outside boundary is a wide rectangle; the middle line is an inside seam.

Put two equal squares together along a whole side without a gap. Trace around both. The outside makes a wider rectangle. The joining line stays inside. Try separating the pieces again: the two small squares are still there, although together they made a new outline.

5. Paper building

Use large paper shapes to build a toy house picture. Describe the roof and window outlines. An adult can help handle pieces while you decide which shapes to join.

6. Notice a triangle

Trace its straight sides.
Three sides.
Count around the whole boundary.
Name the outline.
Triangle.
Three sides define a triangle.

7. Join two squares

Slide full sides together.
No gap or overlap.
The pieces meet along their sides.
Your turn: work this step out. Its working is at the end of the packet.
Trace the outside.

8. Guided practice

Which flat outline has three straight sides?

Audio transcript: None

9. Guided practice

Listen to the names. Match circle and square to their outlines.

	Circle	Square
○
□

Audio transcript: None

10. Practice

A flat paper tile has no corners and is round all the way around. Which tile is it?

Circle
Square
Triangle

Audio transcript: None

11. Somewhere new

![Two squares joined edge to edge](img_pk_joined_squares@1) Two square tiles make a toy floor. What shape is the WHOLE outside outline?

Rectangle
Triangle
Circle

Audio transcript: None

12. Somewhere new

Trace this toy roof outline: △. How many corners does it have?

Answer: corners

Audio transcript: None

13. Lesson test

Lesson test: one question per skill, one attempt each, no hints. Your answers are checked when you submit.

14. Test question

Trace this toy window outline: □. How many corners does it have?

Answer: corners

Audio transcript: None

15. What you can do now

Trace a new outline and tell which edges and corners helped you recognize its shape.

Working for the steps left to you

7. Join two squares, step 2

One rectangle.

Ignore the inside seam.