Bonjour pourrez vous m’aider s’il vous plaît je suis en grande difficulté Exercice 1: Sur la figure ci-dessous, HAB, HBC et HCD sont des triangles équilatéraux.
1. Quelle est la nature des quadrilatères BCDH et ABCH? parallelogrammime
2. (a) Montrer que AB+CB = HČ+CB.

(b) En déduire que AB+CB = HB.
3. Remplacer chacune des sommes vectorielles
suivantes par un vecteur unique :
HC +HA =
DH+AB=
BĦ + AB=
merci à vous

answer: the answer is 127 degrees

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

its a i did it myself

step-by-step explanation:

the correct answer option is d. la = πrs.

step-by-step explanation:

we know that for a right cone, the lateral surface area is given by:

lateral area of right cone =

here the value under the square root is equal to slant height so replacing this value by in the formula to get:

lateral area of right cone =

therefore, the correct answer option is d.