Geometry
Practical excercices:
1. Go around your home and take pictures of things that represent the following (Google the names first if needed!):
- Cone
- Pyramid
- Rectangular prism
- Sphere
- Tetrahedron
- Cylinder
- Cuboid
2. Draw a floor plan of your dream house. Use at least the following shapes in your plan and name them in your drawing.
- Quadrilateral
- Circle
- Square
- Rectangle
- Parallelogram
- Trapezoid
3. Practice using the compass by drawing these beautiful mandala shapes.
Let’s learn the theory:
Credit: Math Antics, YouTube
Exercises:
1. Draw a circle and mark the following parts in it:
- Diameter
- Radius
- Chord
- Circumference
2. Try to find as many objects around you that are shaped like a circle. Take some thread and measure their circumference and diameter. Plot the results in a graph (example below). What do you notice?
Object | Circum- ference | Diameter | Circum- ference /Diameter |
| | | |
| | | |
| | | |
| | | |
3. Calculate the circumference of a circle when the radius is:
4. The circumference of a circle is 74,2 m. Calculate: