Question

Dau coroana celui mai bun raspuns! exetrcitiile 4,5,6

Answer 1

4)180gr-17gr21min=179gr60min-17gr21min=162gr39min

5)pbazei=12 deci lat bazei =12/3=4 (baza triunghi echilateral)
Aria fetei= lat bazeixinaltfata/2
20=4xh/2 deci h=10
muchia lat=rad(10la2+2la2)=rad(100+4)=rad104
Suma muchiilor=Pbazei+3xrad104=12+3rad104

6)9=a+6 deci a=9-6=3
b=10+6=16
a+b=3+16=19

Answer 2

4. 170°60'-17°21' = 153°39'
5. p = 3 • l , 12 = 3 • l , l = 4 cm
l • L = 20 , 4 • L = 20 , L = 5 cm
Sm = 6•l + 3 •L = 6 • 4 + 3 • 5 = 24 + 15 = 39 cm

6. × = a
9 = x + 6 , × = 3
y = 10 + 6 , y = 16 , a + b = 16 + 3 = 19