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.

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<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.

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<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.

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<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.

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<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.