Other tags that relate to Painting Between the Lines
Gradients. Art. GeoGebra. Constructions. Making and proving conjectures. Linear functions and graphs. Simultaneous equations. Video. Similarity and congruence. Practical Activity.There are 90 results
Broad Topics > Physical and Digital Manipulatives > GeoGebra
Parallel Lines
Age 11 to 14 Challenge Level:
How does the position of the line affect the equation of the line? What can you say about the equations of parallel lines?
Perpendicular Lines
Age 14 to 16 Challenge Level:
Position the lines so that they are perpendicular to each other. What can you say about the equations of perpendicular lines?
At Right Angles
Age 14 to 16 Challenge Level:
Can you decide whether two lines are perpendicular or not? Can you do this without drawing them?
Exploring Diagonals
Age 11 to 16
Move the corner of the rectangle. Can you work out what the purple number represents?
Coordinates of Corners
Age 11 to 16
Use the applet to make some squares. What patterns do you notice in the coordinates?
Areas from Vectors
Age 11 to 16
Use the applet to explore the area of a parallelogram and how it relates to vectors.
Translating Lines
Age 11 to 14 Challenge Level:
Investigate what happens to the equation of different lines when you translate them. Try to predict what will happen. Explain your findings.
Squirty
Age 14 to 16 Challenge Level:
Using a ruler, pencil and compasses only, it is possible to construct a square inside any triangle so that all four vertices touch the sides of the triangle.
Reflecting Lines
Age 11 to 14 Challenge Level:
Investigate what happens to the equations of different lines when you reflect them in one of the axes. Try to predict what will happen. Explain your findings.
Solving Together - Estimating Angles
Age 11 to 14
Week 2
How well can you estimate angles? Playing this game could improve your skills.
Impossible Picture?
Age 14 to 16 Challenge Level:
Under what circumstances can you rearrange a big square to make three smaller squares?
A Brief Introduction to the Argand Diagram
Age 14 to 18 Challenge Level:
Complex numbers can be represented graphically using an Argand diagram. This problem explains more...
Mediant Madness
Age 14 to 16 Challenge Level:
Kyle and his teacher disagree about his test score - who is right?
Number Lines in Disguise
Age 7 to 14 Challenge Level:
Some of the numbers have fallen off Becky's number line. Can you figure out what they were?
Mixing More Paints
Age 14 to 16 Challenge Level:
Can you find an efficent way to mix paints in any ratio?
L-triominoes
Age 14 to 16 Challenge Level:
L triominoes can fit together to make larger versions of themselves. Is every size possible to make in this way?
Sine and Cosine for Connected Angles
Age 14 to 16 Challenge Level:
The length AM can be calculated using trigonometry in two different ways. Create this pair of equivalent calculations for different peg boards, notice a general result, and account for it.
Mixing Paints
Age 11 to 14 Challenge Level:
Can you work out how to produce different shades of pink paint?
Overlap
Age 11 to 14 Challenge Level:
A red square and a blue square overlap so that the corner of the red square rests on the centre of the blue square. Show that, whatever the orientation of the red square, it covers a quarter of the. . . .
Angles Inside
Age 11 to 14 Challenge Level:
Draw some angles inside a rectangle. What do you notice? Can you prove it?
Beelines
Age 14 to 16 Challenge Level:
Is there a relationship between the coordinates of the endpoints of a line and the number of grid squares it crosses?
The Farmers' Field Boundary
Age 11 to 14 Challenge Level:
The farmers want to redraw their field boundary but keep the area the same. Can you advise them?
The Medieval Octagon
Age 14 to 16 Challenge Level:
Medieval stonemasons used a method to construct octagons using ruler and compasses... Is the octagon regular? Proof please.
Points in Pairs
Age 14 to 16 Challenge Level:
Move the point P to see how P' moves. Then use your insights to calculate a missing length.
Triangle in a Triangle
Age 14 to 16 Challenge Level:
Can you work out the fraction of the original triangle that is covered by the inner triangle?
Where Is the Dot?
Age 14 to 16 Challenge Level:
A dot starts at the point (1,0) and turns anticlockwise. Can you estimate the height of the dot after it has turned through 45 degrees? Can you calculate its height?
Quad in Quad
Age 14 to 16 Challenge Level:
Join the midpoints of a quadrilateral to get a new quadrilateral. What is special about it?
Nine Colours
Age 11 to 16 Challenge Level:
Can you use small coloured cubes to make a 3 by 3 by 3 cube so that each face of the bigger cube contains one of each colour?
Strolling Along
Age 14 to 18 Challenge Level:
What happens when we multiply a complex number by a real or an imaginary number?
Surprising Equalities
Age 14 to 18 Challenge Level:
Take any triangle, and construct squares on each of its sides. What do you notice about the areas of the new triangles formed?
Mapping the Territory
Age 14 to 18 Challenge Level:
Can you devise a system for making sense of complex multiplication?
Opening the Door
Age 14 to 18 Challenge Level:
What happens when we add together two complex numbers?
Sine and Cosine
Age 14 to 16 Challenge Level:
The sine of an angle is equal to the cosine of its complement. Can you explain why and does this rule extend beyond angles of 90 degrees?
Pythagoras Proofs
Age 14 to 16 Challenge Level:
Can you make sense of these three proofs of Pythagoras' Theorem?
4 Dom
Age 5 to 16 Challenge Level:
Use these four dominoes to make a square that has the same number of dots on each side.
Up and Across
Age 11 to 14 Challenge Level:
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects its vertical and horizontal movement at each stage.
Round and Round a Circle
Age 14 to 16 Challenge Level:
Can you explain what is happening and account for the values being displayed?
How Far Does it Move?
Age 11 to 14 Challenge Level:
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the red dot affects the distance it travels at each stage.
Vanishing Point
Age 14 to 18 Challenge Level:
How can visual patterns be used to prove sums of series?
Arrowhead
Age 14 to 16 Challenge Level:
The points P, Q, R and S are the midpoints of the edges of a non-convex quadrilateral.What do you notice about the quadrilateral PQRS and its area?
Same Length
Age 11 to 16 Challenge Level:
Construct two equilateral triangles on a straight line. There are two lengths that look the same - can you prove it?
Into the Wilderness
Age 14 to 18 Challenge Level:
Let's go further and see what happens when we multiply two complex numbers together!
Subtended Angles
Age 11 to 14 Challenge Level:
What is the relationship between the angle at the centre and the angles at the circumference, for angles which stand on the same arc? Can you prove it?
Rolling Around
Age 11 to 14 Challenge Level:
A circle rolls around the outside edge of a square so that its circumference always touches the edge of the square. Can you describe the locus of the centre of the circle?
Right Angles
Age 11 to 14 Challenge Level:
Can you make a right-angled triangle on this peg-board by joining up three points round the edge?
Squaring the Circle and Circling the Square
Age 14 to 16 Challenge Level:
If you continue the pattern, can you predict what each of the following areas will be? Try to explain your prediction.
Triangles in Circles
Age 11 to 14 Challenge Level:
Can you find triangles on a 9-point circle? Can you work out their angles?
NRICH is part of the family of activities in the Millennium Mathematics Project.