Try calculating the number of handshakes before you click each line. Practice my formula until you have memorised it. You won't regret putting in the effort!
Area of Triangles
Every triangle has a corresponding parallelogram. (Actually 4)
Drag the point A to adjust the triangle.
Base and Height of a Triangle (and its Corresponding Parallegram)
Try making each side of a triangle be the base and see the corresponding height. Drag the red points and see how the dimensions change. Also, see the 3 corresponding parallegrams of each triangle.
Explore the given triangle. Notice how the area doesn't change if the height and base remain constant.
Interactive Triangles
You can explore Scalene, Isosceles and Equilateral Triangles here. Also Right, Acute and Obtuse Triangles. Drag any vertex around and observe for yourself what change and what doesn't change.
Interactive Triangles
You can explore Scalene, Isosceles and Equilateral Triangles here. Also Right, Acute and Obtuse Triangles. Drag any vertex around and observe for yourself what change and what doesn't change.
Interactive Quadrilaterals
Explore Parallelograms (Squares, Rectangles & Rhombuses), Trapeziums/Trapezoids, and Kites. Take note of the properties that change and that remain unchanged.
Explore Parallelograms (Squares, Rectangles & Rhombuses), Trapeziums/Trapezoids, and Kites. Take note of the properties that change and that remain unchanged.
Isometric Drawing Tool
Click on the cube tool at the top left and place as many cubes as you want in the grid.
After that, click on the Inspect Tab and drag the x-axis, y-axis and/or z-axis buttons to rotate the cubes you have built. Very interesting.
Geoboard at mathlearningcenter
Click on the rubber band colour you want to use, then drag and drop it onto the board.
Click on the cube tool at the top left and place as many cubes as you want in the grid.
After that, click on the Inspect Tab and drag the x-axis, y-axis and/or z-axis buttons to rotate the cubes you have built. Very interesting.
Geoboard at mathlearningcenter
Click on the rubber band colour you want to use, then drag and drop it onto the board.
Drag a line to create a new vertex. You can drag a vertex from one peg to another.
Double-tap a vertex to delete it.
You can create any shape you want, with any number of sides.
Try creating squares which are not horizontal, but at various angles to the ground.
Tip: Click Reset if any vertex moves outside the geoboard.
Symmetry Matching
You can practise simple symmetry here.
You can practise simple symmetry here.
Symmetry Sorting
Sort pictures, shapes or letters according to whether they are symmetrical or not.
Sort pictures, shapes or letters according to whether they are symmetrical or not.
