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tg69⁰=h/2
2,6051=h/2
h=5,2102
P=½(6+10)×5,2102
P=41,6816(cm²)
Zad.2.32
Dwa kąty muszą być prostąkątne.
tgα=6/6
tgα=1
α=45⁰
Β=360⁰-90⁰-90⁰-45⁰=135⁰
Zad2.27
sinα=1/2
α=30⁰
β=180⁰-60⁰=120⁰