Triangle Treasure Hunt!

Math Grades 1st Grade 6:35 Video
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Lesson Description

Let's learn about triangles! We'll find them everywhere, count their sides and corners, and have fun being shape detectives!

Video Resource

Grade 1: Math Lesson #13 Identifying a Triangle and the Number of its sides and angles.

The Eagle's Nest - Our Online Classroom

Duration: 6:35
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Key Concepts

  • A triangle has three sides.
  • A triangle has three angles (corners).
  • Triangles can be different sizes and orientations.

Learning Objectives

  • Students will be able to identify triangles in their environment.
  • Students will be able to state that a triangle has three sides and three angles.
  • Students will be able to differentiate triangles from other shapes like circles and squares.

Educator Instructions

  • Introduction (5 mins)
    Begin by watching the YouTube video: 'Grade 1: Math Lesson #13 Identifying a Triangle and the Number of its sides and angles.' Ask students if they have ever heard of a triangle. Briefly discuss shapes they already know (circle, square).
  • Triangle Discovery (10 mins)
    After watching the video, review what a triangle is. Emphasize that a triangle has three sides and three corners (angles). Have students draw a triangle on a piece of paper. Then, have students count the sides and corners together.
  • Shape Hunt (10 mins)
    Conduct a 'Triangle Treasure Hunt' in the classroom. Ask students to look around and find as many triangles as they can. When they find one, have them point to it and say, 'That's a triangle!' and count the sides and corners.
  • Triangle Art (10 mins)
    Provide students with construction paper and scissors. Have them cut out different sizes and colors of triangles. Then, have them glue the triangles onto another piece of paper to create a picture. Encourage them to use triangles to make other shapes (like the dollhouse roof in the video).
  • Wrap-up (5 mins)
    Review what they learned about triangles. Ask: How many sides does a triangle have? How many angles does it have? What are some places you can find triangles? Play a quick game of 'Triangle, Circle, Square' where you call out a shape and students must point to something in the room that is that shape.

Interactive Exercises

  • Shape Sorting
    Provide students with a set of shape cutouts (circles, squares, triangles). Have them sort the shapes into groups, explaining why each shape belongs in its group.
  • Triangle Building
    Give students straws or craft sticks and have them use these materials to build triangles. They can also use playdough to form the shapes.

Discussion Questions

  • What makes a triangle different from a circle or a square?
  • Can you think of any real-life objects that are shaped like triangles?

Skills Developed

  • Shape recognition
  • Counting
  • Spatial reasoning
  • Observation Skills

Multiple Choice Questions

Question 1:

How many sides does a triangle have?

Correct Answer: 3

Question 2:

How many corners does a triangle have?

Correct Answer: 3

Question 3:

Which of these is a triangle?

Correct Answer: Triangle

Question 4:

Is a ball a triangle?

Correct Answer: No

Question 5:

What is another word for the corners of a shape?

Correct Answer: Angles

Question 6:

If you see a shape with 3 sides, it's probably a:

Correct Answer: Triangle

Question 7:

The roof of the dollhouse in the video was shaped like a:

Correct Answer: Triangle

Question 8:

Can triangles be big or small?

Correct Answer: Yes, big or small

Question 9:

Which of these has 4 sides and 4 angles?

Correct Answer: Square

Question 10:

Are all triangles the same color?

Correct Answer: No

Fill in the Blank Questions

Question 1:

A triangle has three ________.

Correct Answer: sides

Question 2:

A triangle has three ________ (corners).

Correct Answer: angles

Question 3:

The shape with no angles that rolls is a ________.

Correct Answer: circle

Question 4:

A ________ has four sides and four angles that are the same.

Correct Answer: square

Question 5:

We went on a shape ________ to find triangles!

Correct Answer: hunt

Question 6:

The giant shape in the playground was a red ________.

Correct Answer: triangle

Question 7:

The top of the doll house looked like two smaller ________.

Correct Answer: triangles

Question 8:

A triangle is a type of ________.

Correct Answer: shape

Question 9:

Corners of a shape are called ________.

Correct Answer: angles

Question 10:

Can your eyes go on a shape hunt ________.

Correct Answer: anytime

Educational Standards

CCSS.Math.Content.1.G.A.1:Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes. CCSS.Math.Content.1.G.A.2:Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectangular prisms, right circular cones, and right circular cylinders) to create a composite shape, and compose new shapes from the composite shape. (Students do not need to learn formal names such as 'right rectangular prism.')

Teaching Materials

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