Notice how the triangle result doesn't have area as a function of a, b and c. That's called Heron's formula and is usually not taught to secondary school students. I don't like to teach it either because Archimedes' Theorem is so much better:

The sides a,b,c and area S of a triangle satisfy

$16S^2 = (a+b+c)(-a+b+c)(a-b+c)(a+b-c) = 4a^2b^2-(c^2-a^2-b^2)^2 = (a^2+b^2+c^2)^2 - 2(a^4+b^4+c^4)$

7 0

3 years ago

Make 6 prime number using 1,2,3,4,5,6,7,8,9

Crazy boy [7]

Answer:

13,67,29,17,19,23

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

What is the probability of picking a card that is neither a club nor a 2 nor a 3?

I am Lyosha [343]

The amount of cards that isn't a club, 2, or 3 is 33 cards if we have a 52 card deck.

So our probability is 33/52

To get that to a percentage we need to change that to a decimal. To do that, we divide 33 by 52. If we do that we get 0.635 if we round to the nearest thousandth.

To change that to a percentage we multiply that by 100

0.635 times 100 equals 63.5

So the probability of picking a card that isn't a club, 2, nor 3 is 63.5%

Any questions?

7 0

3 years ago