Priveste figura alaturata. Muchia AB are 10 cm, iar muchia BC are 5 cm. a) Afla perimetrulbazei (ABCD) paralelipipedului.

b) Afla lungimea muchiei BF, stiind ca suma tuturor muchiilor paralelipipedului este egala cu 80 cm.

c) Stiind ca ABCDEFGH este un paralepiped dreptunghic si ca muchia AE = BF = 5cm scrie cate cuburi se pot obtine din paralepiped.

VA ROG AJUTATI-MA REPEDD E=AM NEVOIE NEAPARAT

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

the answer for this question is a= 13,622.84

step-by-step explanation: