7. The radius of a semicircular garden is 28 m . How much more distance has one to cover for going from A to B on the circular path instead of going on diametrical path? \( \begin{array}{llll}\text { (Choose two correct alternatives.) } \\ \text { (1) } 7.2 \mathrm{~m} & \text { (2) } 32 \mathrm{~m} & \text { (3) } 0.32 \mathrm{hm} & \text { (4) } 320 \mathrm{~cm}\end{array} \)

Figure 4.27 The areas of two similar triangles are \( 64 \mathrm{~cm}^{2} \) and \( 144 \mathrm{~cm}^{2} \), a) Find the ratio of their altitudes. b) If the perimeter of the smaller triangle is 49 cm , find the perimeter of the larger triangle.

Arc Length Find the arc length for the following. 13. A circle has a radius of 5.75 inches. Find the length of the arc intercepted by a central angle of \( \frac{5 \pi}{6} \). 14. A circle has a diameter of 10 inches. Find the length of the arc intercepted by a central angle of \( 125^{\circ} \).

यदि त्रिभुज ABC समबाहु त्रिभुज भएको अवस्थामा \( \Varangle \mathrm{ABC} \) र शीर्षबिन्दु A तथा बिन्दु D लाई \( \mathrm{AC}=\mathrm{CD} \) हुद शत जोड्दा बन्ने \( \triangle \mathrm{ACD} \) मा बनेको कोण \( \Varangle \mathrm{CAD} \) बिचको अनुपात गणना गरी उल्लेख्य गर्नुहोस् । If triangle \( A B C \) is an equilateral triangle then calculate and mention the ratio between \( \angle A B C \) and \( \angle C A D \) formed in \( \Varangle A C D \) which is formed by joining vertex \( A \) and point \( D \) in such a way that: \( A C=C D \).

QUESTION \( 16 \cdot 1 \) POINT Find the equation of the line passing through the points \( (-2,5) \) and \( (-7,5) \).

Determine if the following lines are parallel, perpendicutar, or neither. \[ \begin{array}{l}y=\frac{x}{3}-7 \\ y=-3 x+5\end{array} \]