Select the correct answer from each drop-down menu. Rewrite the formula for area of a circle to find the radius of a circle. The area of a circle \( (A) \) is given by the formula \( A=\pi r^{2} \) where \( r \) is the circle's radius. The formula to find \( r \) is \( A=54 \) centimeters \( { }^{2} \) and \( \pi=\frac{22}{7}, r \) is \( \quad \therefore \) centimeters.

Sketch each triangle. Then, determine the unknown side and angles. If two solutions are possible, give both. a) In \( \triangle \mathrm{ABC}, \mathrm{AB}=15 \mathrm{~m}, \mathrm{BC}=5 \mathrm{~m} \), and \( \angle \mathrm{A}=20^{\circ} \).

Ein Kreis hat 3 cm Radius. ( \( \pi \approx 3,14 \) ) Wie groß ist a) der Kreisumfang; b) die Kreisfläche?

Câu 28. Cho tam giác \( A B C \) đều cạnh \( a \), có \( A H \) là đường trung tuyến. Biết rằng \( |\overrightarrow{A C}+\overrightarrow{A H}|=\frac{a v b}{c} \). Tính \( b-c \). \( \mathrm{KQ}: \square \)

Encontrar la distancia entre los puntos dados: \( (1,-2,4) \quad(4,-3,1) \)

181. V pravokotnem trikotniku \( A B C \) sta višina in težiščnica na hipotenuzo v razmerju \( 40: 41 \). Izračunajte razmerje katet.