Currently viewing the tag: "Constructions"
What can you discover by accurately constructing some right angled triangles with integer edge lengths and their inscribed circles (incircles)?
If you make some conjectures, can you prove them?
Share ideas below about what you have discovered.
More ideas about incircles will be posted here. Watch this space.
Click here to register for the 2022 GLOBAL MATHS AND SCIENCE LESSON ON TUESDAY 11 OCTOBER. See below for links to lesson resources in English and Spanish.
Sheep Talk The first sheep talk word is A. To find the next term in the word sequence, each A is replaced by B […]
Start to explore ideas of Fibonacci numbers and the golden ratio by copying the picture and drawing this spiral which is made up of quarter circles. Watch this inspirational video. To download the poster click here.
Then create your own elephant. The numbers in the centres of the squares […]
We know birds come from eggs.
You can make many birds from the 9 puzzle pieces of the Magic Tangram Egg.
Break the egg and re-assemble the 9 pieces to hatch one of many varieties of birds.
Construction
Draw a circle with radius […]
Click here for Learner’s worksheet with instructions for measuring angles and doing geometrical constructions.
Accurately copy the following patterns and vary them to make your own designs.
1. ENVELOPE PATTERNS WITH STRAIGHT LINES
Draw two base lines and mark the same number of points at equal distances along each line. Join […]
a. Draw 2 circles with equal radii, intersecting at C, so that each goes through the centre of the other.
b. Draw a third circle of the same radius with centre C.
c. Draw 4 more circles with centres on the circle centre A and passing through A.
1. ENVELOPE PATTERNS WITH STRAIGHT LINES
These straight lines form a family and the curves that you see, called envelopes, are tangent to each line in the family.
Draw two base lines and mark the same number of points at equal distances along each line. Join the outermost point on one base […]
Describe the picture? What do you notice? Talk with your friends about it. What shapes can you see in it?
Describe the different symmetries. Draw the picture yourself. Draw your own designs using this idea. Can you explain how this 2-dimensional picture appears to show a 3-dimensional object?
You could use paperclip […]
STEP 1
1a) Double click on the picture above to start the movie showing how to draw a circle using the paperclip compass.
1b) Draw 2 circles of the same radius with centres A and B so that each circle goes through the centre of the […]
The picture shows you how to use a paper clip to draw circles. You just need to open out the paper clip as shown,
Draw a circle and mark 24 points equally spaced around the circumference. To do this, draw a circle and mark the centre, and mark your first point on […]
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