1. Word cloud

120 seconds

What is the name of the study of shapes and angles?

2. Slide

60 seconds

Geometry is the study of shapes, angles, and lines. Geometry helps us understand the world around us. We use geometry to measure and build things.

Geometry Basics

3. Slide

60 seconds

Lines: A line is a straight path that goes on forever in both directions and has no thickness. Angles: An angle is formed when two rays or line segments begin at the same point and extend in different directions. Triangles: A triangle is a three-sided polygon with three straight sides that are joined together.

Concepts:

4. Slide

60 seconds

A triangle can have more than three angles. A triangle with four or more angles is called an 'exterior angle'. The angles of an equilateral triangle are all 60°. The angle sum of a convex pentagon is 540°.

Did you know?

5. Open question

300 seconds

What shapes can you think of that have four sides?

6. Open question

300 seconds

How might you be able to tell if two shapes are the same?

7. Open question

300 seconds

What have you learned about shapes with four sides?

8. Open question

300 seconds

What strategies can you use to figure out how many sides a shape has?

9. Drawings

450 seconds

Brain break: Draw a balloon holding a flower.

10. Poll

60 seconds

What is a shape with three sides called?

- Rectangle
- Circle
- Square
- Triangle

11. Poll

60 seconds

What kind of angle is less than 90 degrees?

- Right angle
- Obtuse angle
- Acute angle

12. Poll

60 seconds

Which shape has six equal sides and six equal angles?

- Heptagon
- Pentagon
- Hexagon
- Octagon

13. Poll

60 seconds

What do you call the distance around a circle?

- Circumference
- Length
- Perimeter
- Area

14. Poll

60 seconds

What do you call the longest side of a right triangle?

- Opposite Side
- Hypotenuse
- Adjacent Side
- None of these

15. Open question

180 seconds

Work together in pairs: What shape has four sides and four angles?

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