2 years ago

This figure shows how to create a six-pointed star from twelve equilateral triangle tiles:

Mathematics

1 answer:

Nady [450]2 years ago

7 0

Answer:

40 cm

Step-by-step explanation:

The perimeter of the final figure has 12 edges, each of which is 1/3 of the perimeter of an original tile. The final star has a perimeter of ...

(12)(10 cm)/3 = 40 cm

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A bag holds 1 blue block and 3 yellow blocks. How many green blocks should be added to the bag to make the probability of random

Drupady [299]

$n$ - the number of green blocks which is equal to the number of favourable events
$1+3+n=4n$ - the number of all blocks, which is equal to the number of all possible outcomes

$P(A)=\dfrac{n}{4+n}=\dfrac{1}{2}\\
1\cdot( 4+n)=2\cdot n\\
4+n=2n\\
2n-n=4\\
n=4
$