Ploščina in obseg

Question 1

Palerlogram

Answer 1

• S = ava = bvb = absina = absinb
• a + b = 180

Question 2

Pravokotnik

Answer 2

• S = ab
• d^2 = a^2 + b^2

Question 3

Kvadrat

Answer 3

• o = 4a
• S = a^2
• d = a√2

Question 4

Romb

Answer 4

• S = ava = a^2sina = a^2sinb = ef/2

Question 5

Trapez

Answer 5

-S = a + c/2 * v
- a + d = 180
- enakostranični trapez:
b^2 = (a - c/2)^2 + v^2

Question 6

Deltoid

Answer 6

• S = ef/2 = absina

Question 7

Trikotnik

Answer 7

• ava/2 = bvb/2 = cvc/2 = bcsina/2
• enakostranični: S = a^2√3/4
• pravokotni: S k1k2/2