Fractions

Fractions

Fractions can be shown with a diagram. This app is useful for teacher showing fractions and for testing also.

<Show embed code>

<iframe fullscreen="" height="500px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/xhvxmnq6/width/500/height/500/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="500px"> </iframe>

Curved lenses and mirrors

This is exercise for curved lenses and mirrors.

Convex lens

In this exercise you can adjust focal length of the lens and the refractive index of material.


<Show embed code>

<iframe fullscreen="" height="450px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/kacggpzt/width/700/height/450/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="700px"> </iframe>

Number line

Number line

Number line can be tricky. In this app you have to solve what number X represents.

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<iframe fullscreen="" height="270px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/frqu5kvw/width/700/height/270/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="700px"> </iframe>

Area of a trapezoid

Area of a trapezoid

This app demonstrates the area of a trapezoid. Move the sliders to proceed.

<Show embed code>

<iframe fullscreen="" height="450px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/vzpnwpbr/width/580/height/450/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="580px"> </iframe>

Multiplication

Multiplication

Test and learn multiplication with this small applet. You can set min and max for numbers tested.

<Show embed code>

<iframe fullscreen="" height="180px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/yet5wgtd/width/370/height/180/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="370px"> </iframe>

Parallelogram

Parallelogram

Area of a parallelogram. Move the slider to see explanation.

<Show embed code>

<iframe fullscreen="" height="300px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/xqydy3a4/width/350/height/300/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="350px"> </iframe>

Triange inside of a circle

Triangle inside of a circle

Draw perpendicular bisectors to each side of a triangle. This way you get intersect which is center point of a circle that seals in the original triangle.

<Show embed code>

<iframe fullscreen="" height="350px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/adbxndyn/width/450/height/350/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="450px"> </iframe>

Circle inside of a triangle

Circle inside of a triangle

Circle can be drawn inside of a triangle. Centerpoint of a circle is intersect of angle bisectors.

<Show embed code>

<iframe fullscreen="" height="350px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/a3pnpbxu/width/400/height/350/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="400px"> </iframe>

Angles of a triangle

Angles of a triangle

One of the first things we learn about triangle geometry, is the sum of its angles, 180^o. This app demonstrates why is it so. Move the slider(s) to see.

<Show embed code>

<iframe fullscreen="" height="500px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/dghje9zb/width/500/height/500/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="500px"> </iframe>

Parabola

Parabola

Parabola is graph of quadratic function and part of the conic sections family.
In this applet you can adjust values for a, b and c in graph: y = ax² + bx + c

• How many possible roots there are?
• How many interceptions with y-axis?

<Show embed code>

<iframe fullscreen="" height="600px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/pst6xbpc/width/680/height/600/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="680px"> </iframe>

Area of Triangle

Area of a triangle

Area is calculated: 1/2 * base * height. In this applet area of a triangle is represented with blue color and it is area of a rectangle divided by 2.

<Show embed code>

<iframe fullscreen="" height="430px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/rupp6ccu/width/520/height/430/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="520px"> </iframe>

Central angle and inscribed angle

Central angle and inscribed angle of a circle

Can you find out what is the relationship between central angle and inscribed angle of a circle.

<Show embed code>

<iframe fullscreen="" height="350px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/yvwan9mc/width/350/height/350/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="350px"> </iframe>

Pi

What is pi? Why is it approximately 3.14?

This small applet demonstrates circumference of a circle with diameter 1.

<Show embed code>

<iframe fullscreen="" height="310px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/th6ahubq/width/700/height/310/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="700px"> </iframe>

Function of degree 1

First degree function

A function of degree one can be represented with a line. In this app you can change the gradient (k) and intercept (b) of function y = kx + b. See what happens.

Small applets for simplifying expressions

Simplify algebraic Expression

I created four different small apps for simplifying expressions. Every applet is a game, in which you collect points. 

<show embed code>

<iframe fullscreen="" height="160px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/tzx7uaem/width/300/height/160/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="300px"> </iframe>

Fractions

How to show fractions? With this applet you can teach fractions easily.
<show embed>

<iframe fullscreen="" height="500px" scrolling="no" src="https://www.geogebra.org/material/iframe/id/xhvxmnq6/width/500/height/500/border/000000/rc/false/ai/false/sdz/false/smb/false/stb/false/stbh/false/ld/false/sri/false" style="border: 0px;" width="500px"> </iframe>

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Multiply!

Multiply!

In this game you have to multiply given numbers. You can choose between positive and negative numbers.