Recent questions tagged ch-7

In a $\Delta ABC,AD$ is the bisector of $\angle BAC$.If $AB=6$ cm,$AC=5$ cm,and $BD=3$ cm,then $DC$=

asked Jan 2, 2015 by sreemathi.v

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A man goes $24$ m due west and then $7$ m due north.How far is he from the starting point?

asked Jan 2, 2015 by sreemathi.v

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$\Delta ABC\sim \Delta DEF$.If $BC=3$ cm,$EF=4$ cm and ar$(\Delta ABC)=54\; cm^2$,then ar$(\Delta DEF)$=

asked Jan 2, 2015 by sreemathi.v

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$\Delta ABC \sim \Delta DEF$,ar $(\Delta ABC)=9 cm^2$,ar $(\Delta DEF)=16 cm^2$.If $BC=2.1$ cm, then the measure of EF is

asked Jan 2, 2015 by sreemathi.v

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$\Delta ABC \sim \Delta DEF$ such that $DE=3$ cm,$EF=2$ cm,$DF=2.5$ cm,$BC=4$ cm,the perimeter of the $\Delta ABC$ is

asked Jan 2, 2015 by sreemathi.v

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In a $\Delta ABC$ which is an equilateral triangle such that $AD\perp BC$,then $AD^2$=_____

asked Jan 2, 2015 by sreemathi.v

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In an equilateral triangle ABC,if $AD\perp BC$,then

asked Jan 2, 2015 by sreemathi.v

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ABCD is a trapezium such that $BC\parallel AD$ and $AB=4$ cm.If the diagonals AC and BD intersect at O such that $\large\frac{AO}{OC}=\frac{DO}{OB}=\frac{1}{2}$,then $BC$=

asked Jan 2, 2015 by sreemathi.v

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If D,E,F are the mid-points of sides BC,CA and AB respectivelyof $\Delta ABC$,then the ratio of the areas of triangles DEF and ABC is

asked Jan 2, 2015 by sreemathi.v

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A vertical stick $12$ cm long casts a shadow $8$ cm long on the ground.At the same time a tower casts a shadow 40 m long on the ground.The height of the tower is _______

asked Jan 2, 2015 by sreemathi.v

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A ladder reaches a window which is 12 m above the ground on one side of the sheet,keeping its foot at the same point,the ladder is turned to the other side of the sheet to reach a window $9$ m high.The length of the ladder is $15$ m,then the width of the sheet is ______

asked Jan 2, 2015 by sreemathi.v

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The perimeters of two similar triangles are $30$ cm and $20$ cm respectively.If one side of the first triangle is $15$ cm,the corresponding side of the second triangle is _____

asked Jan 2, 2015 by sreemathi.v

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In the given figure $AB\parallel MN$.If $PA=x-2,PM=x,PB=x-1$ and $PN=x+2$,find the value of $x$.

asked Jan 2, 2015 by sreemathi.v

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In the given figure,AD is the bisector of $\angle BAC$.If $BD=2$ cm,$DC=3$ cm and $AB=5$ cm,then $AC$=______

asked Jan 2, 2015 by sreemathi.v

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Two poles of height $7$ m and $12$ m stand on a plane ground.If the distance between their feet is $12$ m,then the distance between their tips is __________

asked Jan 2, 2015 by sreemathi.v

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The area of a right angled triangle if its radius is $3$ cm and altitude drawn to the hypotenuse is $2$ cm is ______

asked Jan 2, 2015 by sreemathi.v

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In two similar triangles $ABC$ and $DEF,AC=10\;cm$ and $DF=8\; cm$ and $AB=6.5$ cm then $DE$=______

asked Jan 2, 2015 by sreemathi.v

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In $\Delta$ ABC,DE$\parallel$BC.If $AD=x,DB=x-2,AE=x+2$ and $EC=x-1$,then the value of $x$ is _____

asked Jan 2, 2015 by sreemathi.v

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The length of a diagonal of a rectangle whose adjacent sides are $8$ m and $6$ m long is _______

asked Jan 2, 2015 by sreemathi.v

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Triangles ABC and DEF are similar as shown in the figure.The area of $\Delta ABC$ is $16$ sq.cm and that of $\Delta DEF$ is $25$ sq.cm.If $BC=2.3$ cm then $EF$ is _______

asked Dec 31, 2014 by sreemathi.v

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In the given figure AD is the bisector of $\angle BAC, AB=6$ cm,$AC=5$ cm and $BD=3$ cm then $DC$=_______

asked Dec 31, 2014 by sreemathi.v

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Two triangles ABC and DEF are similar to each other in which $AB=10$ cm and $DE=8$ cm,then the ratio of the areas of $\Delta ABC$ and $\Delta DEF$ is ________

asked Dec 31, 2014 by sreemathi.v

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