Consider the line \( y=\frac{5}{7} x+7 \). Find the equation of the line that is parallel to this line and passes through the point \( (-7,4) \). Find the equation of the line that is perpendicular to this line and passes through the point \( (-7,4) \).

How long is an arc intercepted by the given central angle in a circle of radius 3.97 km ? \( 150^{\circ} \)

5. Draw the points in a coordinate system (unit 1 cm\( ) \). Connect them to form a square and calculate the area. To do this, measure the required lengths. \( \begin{array}{ll}\text { a) } A(1 \mid 2) ; B(2 \mid 0) ; C(4 \mid 2) ; D(2 \mid 4) & \text { b) } A(4,5 \mid 1) ; B(13 \mid 5) ; C(8 \mid 10,5) ; D(1 \mid 9,5) \\ \text { c) } A(2 \mid 5) ; B(5 \mid 2) ; C(12 \mid 5) ; D(5 \mid 8) & \text { d) } A(6 \mid 1,5) ; B(10,5 \mid 1) ; C(10 \mid 5,5) ; D(2 \mid 9,5)\end{array} \)

115. Una corda è lunga 32 cm . Congiungendo i suoi estremi con il centro del cerchio cui appartiene si ottiene un triangolo avente l'area di \( 480 \mathrm{~cm}^{2} \). Calcola l'area del cerchio. [1156 \( \left.\pi \mathrm{cm}^{2}\right] \)

22. \( A B C \) düzbucaqlı üçbucağında \( C M \) median və \( A D \) tənböləndir. \( \angle A C B=90^{\circ}, C M=30 \mathrm{sm} \) va \( C D: D B=2: 5 \) olarsa, \( A C \) katetini tapın

7 Utgå från vektorn \( \vec{v}=(-6,2) \) Vektorn \( \vec{u}=(a, 3) \) har sarmma riktning som \( \vec{v} \). Bestäm talet \( a \).