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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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.

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What is pi? Why is it approximately 3.14?

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

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<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.