Question : Chords $\overline{AB}$ and $\overline{CD}$ of a circle intersect inside the circle at point F. If $m(\overline{AF})=2.4$ cm, $m(\overline{BF})=1.8$ cm and $m(\overline{CD}) = 5.7$ cm, what is the length (in cm) of the longer of the two line segments, $\overline{CF}$ and $\overline{DF}$?
Option 1: 4.5
Option 2: 4.8
Option 3: 5.4
Option 4: 3.6
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Correct Answer: 4.8
Solution : $m(\overline{AF}) = 2.4$ cm $m(\overline{BF}) = 1.8$ cm $m(\overline{CD}) = 5.7$ cm Let CF = $x$ cm DF = ($5.7-x$) cm Since AB and CD are two chords of a circle that intersect at point F, AF × BF = CF × DF ⇒ 2.4 × 1.8 = $x$ × ($5.7-x$) $\therefore x$ = 4.8, 0.9 CF = 4.8, DF = 0.9 or, CF = 0.9, DF = 4.8 $\therefore$ Longest value = 4.8 Hence, the correct answer is 4.8.
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Question : $\overline{\mathrm{CT}}$ is a tangent to a circle at the point $\mathrm{T}$ on the circle. Chord $\overline{\mathrm{AB}}$ of the circle is extended to meet the tangent $\overline{\mathrm{CT}}$ at the point $\mathrm{C}$. If $\mathrm{m}(\overline{\mathrm{AB}})=3 \mathrm{~cm}$ and $\mathrm{m}(\overline{\mathrm{BC}})=2.4 \mathrm{~cm}$, find the length (in $\mathrm{cm}$ ) of the tangent $\overline{\mathrm{CT}}$.
Option 1: 4.2
Option 2: 3.6
Option 3: 3.2
Option 4: 4.0
Question : Chords AB and CD of a circle intersect at E. If AE = 9 cm, BE = 12 cm, and CE = 3DE, then the length of DE(in cm) is:
Option 1: $\frac{9}{4}$
Option 2: $4$
Option 3: $6$
Option 4: $7$
Question : In a triangle DEF, DP is the bisector of $\angle D$, meeting EF at P. If DE = 14 cm, DF = 21 cm and EF = 9 cm, find EP.
Option 1: 3.6 cm
Option 2: 5.4 cm
Option 3: 6.3 cm
Option 4: 2.7 cm
Question : In a circle, two chords $AB$ and $CD$ intersect each other internally at point $P$. If $AB=16\; cm, PB =6\;cm $, and $PD =12\; cm$, then the value of $PC$ (in $cm $) is equal to:
Option 1: 3
Option 2: 8
Option 3: 6
Option 4: 5
Question : BE and CF are two altitudes of a triangle ABC. If AB = 6 cm, AC = 5 cm, and CF = 4 cm. Then, the length of BE is:
Option 1: 4.8 cm
Option 2: 7.5 cm
Option 3: 3.33 cm
Option 4: 5.5 cm
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