Question

Am nevoie de ajutor! DAU COROANA!

Answer 1

Răspuns:

Explicație pas cu pas:

Aria unui triunghi este egala cu:

$A=\frac{b\cdot h}{2}$

a. BC=6 AD=5 BE=4,5

$A=\frac{AD\cdot BC}{2}=\frac{BE\cdot AC}{2}$

$15=\frac{4,5\cdot AC}{2}$

AC=30:4,5=$30\cdot \frac{10}{45} =\frac{20}{3}$

b. AD=4,2 BE=5,6 AC=6

$\frac{4,2\cdot BC}{2} =\frac{5,6\cdot 6}{2}$

BC=8

c. A=21

BC=8,4

$21=\frac{BC\cdot AD}{2}$

$21=\frac{8,4\cdot AD}{2}$

AD=5

d.BC=4,8 AD=5,2 BC=5

$12,48=\frac{5\cdot AC}{2}$

AC=4,992