## Search Results

### Name Letters

3-5, 6-8, 9-12
Use this activity to practice solving systems of equations. Use this tool to check students' answers.

### Scale Factor

6-8, 9-12
Use this applet to investigate how changes in the scale factor influence the ratio of perimeters and the ratio of areas between two figures.

### Proof Without Words: Pythagorean Theorem

6-8
This applet proves the Pythagorean Theorem "without words" using geometry.

### Product Game

3-5, 6-8
This applet is the Product Game: a fun, interactive game that exercises your skill with factors and multiples.

### Personal Number

3-5, 6-8
Find your personal number using your birthday! It is the month + date + year & month × date × year.

### Pi Fight

6-8, 9-12

Become comfortable with using both radians and degrees.

### Area of Triangles

3-5, 6-8

To find the area of a triangle, try to make a parallelogram using a copy of the triangle.

### Handshakes

3-5, 6-8

When the nine justices of the Supreme Court meet, they greet one another with a handshake to show harmony of purpose, even though their views may differ. How many handshakes occur? In general, how many handshakes occur when there are n people?

### Geogebra:Dynagraphs

6-8, 9-12

Explore relationships between inputs and outputs by manipulating interactive double number lines.

This interactive is optimized for your desktop and tablet.

### Isosceles Triangle Area

6-8
Explore when an isosceles triangle obtains its maximum area.