euro maths ce qu'il me manque

Question 1

interior angles of a polygon

Answer 1

the interior angles of a polygon are the angles inside each vertex/corner
The sum of a polygon’s interior angles (S) and its number of sides are related by this formula : S = (n-2) x 180

Question 2

exterior angles of a polygon

Answer 2

The exterior angles of a polygon are the angles between a side and a line that extends out from one of the neighbouring sides
The sum of the exterior angles of any polygon is 360degrees
a+b+c+d+e=360

Question 3

what does the Phytagoras’ Theorem state ?

Answer 3

It states that, in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the legs

Question 4

what is sin-1 called (also for tangent and cosine) ?

Answer 4

the inverse sine / cosine/tangent

Question 5

1/5 is the “…” of 5

Answer 5

the reciprocal

Question 6

how do you say :
3puissance11
3puissance -1
3puissance-3

Answer 6

three raised to the eleventh power
three raised to the negative first power
three raised to the negative third power

Question 7

the area of a circle

Answer 7

pi x rcarré

Question 8

the circumference of a circle

Answer 8

2 x pi x r = pi x diameter

Question 9

la réciproque d’un théorème

Answer 9

the converse of a theorem

Question 10

l’inverse d’un nombre

Answer 10

the reciprocal of a number