# maths

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Q. Add one or more lines to make these shapes rigid.
1) square
2) rectangle
3) issoceles
4) pentagon
5) trapezium
6) octagon

Thank you very much.

• maths -

Make them into a bunch of triangles with interior lines. Triangles do not change shape once the length of the three sides is fixed. (side,side,side --->congruent)
For example once you draw one diagonal in a square, it is split into two triangles and will not squish into a parallelogram.
This is not just theory. It is how you build bridges and buildings.

• maths -

Can you tell me how to turn a percentages into a fraction?

• maths -

mIA, don't tag new questions on the end of other problems, start a new post.

percent means per centum or per hundred

so whatever the percentage number is, divide it by 100, then reduce to lowest terms if needed.
e.g.
35% = 35/100 = 7/20
7% = 7/100
12.3% = 12.3/100 = 123/1000

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