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a) β = (180° - 110°) :2
b) P = * 2a * h
28 cm² = * 2a * 7 cm
2a = 28 cm² : 7 cm * 2
a = 28 cm² : 7 cm
a = 4 cm
c) 180° = α + 2α
3α = 180° /:3
α = 60°
d) 360° = 210° + 2β + 4β
6β = 360° - 210°
6β = 150° /:6
β = 25°
6.
a) 10 = c + 2c +1
10 = 3c + 1
3c = 10 - 1
3c = 9 /:3
c = 3
b) 11 = d + 4d +1
11 = 5d + 1
5d = 11 - 1
5d = 10 /:5
d = 2
7. Ob = 3x + 2x + 4x + x + 7x + 3x
40 cm = 20x
20x = 40cm /:20
x = 2 cm
długości boków
3 * x = 3 * 2 cm = 6 cm
2 * x = 2 * 2 cm = 4 cm
4 * x = 4 * 2 cm = 8 cm
x = 2 cm
7 * x = 7 * 2 cm = 14 cm
3 * x = 3 * 2 cm = 6 cm
Pomogłem? Daj naj ;)
x3=6cm x4=8cm c=3 2c+1=7
x2=4cm x=2cm d=2 4d+1=9
podstawa=14cm
lewy bok = 6cm
myślę że pomogłam :)