\( \begin{array}{ll}\text { L'asse di un segmento } & \\ 60 \text { Indica il completamento corretto. } & \square \text { la retta perpendicolare al segmento nel suo } \\ \text { L'asse di un segmento è: } & \text { punto medio } \\ \square \text { il segmento perpendicolare al segmento nel } & \square \text { la retta perpendicolare al segmento passan- } \\ \text { suo punto medio } & \text { te per uno dei suoi estremi } \\ \square \text { la retta passante per il suo punto medio } & \end{array} \)

लघु उत्तरीय प्रश्न (Short Answer Type Questions) 6. एक घनाभ का पृष्ठीय क्षेत्रफल 1300 सेमी \( ^{2} \) है। यदि इसकी चौड़ाई 10 सेमी है तथा ऊँचाई 20 सेमी है तो इसकी लम्बाई ज्ञात कीजिए।

A triangle has a perimeter of 20 and two of its sides measure 7 and 5 . What is the length of the third side?

\( Q(7,10) \). Cari kecerunan bagi persamaan pembahagi dua sama serenjang untuk garis lurus \( P Q \). (TP4) A straight line passes through point \( (P(2,5) \) and point \( Q(7,10) \). Find the gradient of the equation of the perpendicular bisector for the straight line \( \overline{P Q} \) [3 markah / marks \( ] \)

24) ABC is a triangle in which \( \mathrm{m}(\angle \mathrm{A})=60^{\circ}, \mathrm{b}: \mathrm{c}=5: 8 \) and the area of the circumcircle of the triangle ABC is \( 147 \pi \mathrm{~cm}^{2} \), then the perimeter of \( \triangle \mathrm{ABC}=\ldots \ldots \ldots \cdots \cdot \mathrm{cm} \). \( \begin{array}{llll}\text { (a) } 21 & \text { (b) } 34 & \text { (c) } 54 & \text { (d) } 60\end{array} \)

Find the condition at which the line \( l x+m y+n=0 \) touches the circle \( x^{2}+y^{2}+28 x+2 f y+c=0 \) For what value of \( n \), a. the line \( 3 x+4 y+n=0 \) touches the circle \( x^{2}+y^{2}-4 x-6 y-12-02 \)