Download Doubtnut Today TRIANGLES CLASS 9 ......CLASS 9 FOUNDATION COURSE TRIANGLES Download...
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CLASS 9 FOUNDATION COURSE TRIANGLES Download Doubtnut Today Ques No. Question 1 1410781 CLASS 9 FOUNDATION COURSE TRIANGLES The sum of two angles of a triangle is equal to its third angle. Determine the measure of the third angle. Click to watch Free Video Solution of this question on Doubtnut 2 1410782 CLASS 9 FOUNDATION COURSE TRIANGLES Of the three angles of a triangle, one is twice the smallest and another is three times the smallest. Find the angles. Click to watch Free Video Solution of this question on Doubtnut 3 1410783 CLASS 9 FOUNDATION COURSE TRIANGLES If the angle of a triangle are in the ratio determine three angles. Click to watch Free Video Solution of this question on Doubtnut 4 1410796 CLASS 9 FOUNDATION COURSE TRIANGLES If the angles of a triangle are in the ratio determine three angles. Click to watch Free Video Solution of this question on Doubtnut 5 1410798 CLASS 9 FOUNDATION COURSE TRIANGLES The angle of a triangle are arranged in ascending order of magnitude. If the difference between two consecutive angles is find the three angles. Click to watch Free Video Solution of this question on Doubtnut 6 1410799 CLASS 9 FOUNDATION COURSE TRIANGLES Two angles of a triangle are equal and the third angle is greater than each of those angles by Determine all the angles of the triangle. Click to watch Free Video Solution of this question on Doubtnut
Transcript of Download Doubtnut Today TRIANGLES CLASS 9 ......CLASS 9 FOUNDATION COURSE TRIANGLES Download...
CLASS 9 FOUNDATION COURSE
TRIANGLES
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Ques No. Question
1 1410781
CLASS 9 FOUNDATION COURSE TRIANGLES
The sum of two angles of a triangle is equal to its third angle. Determine the measure of the third angle.
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2 1410782
CLASS 9 FOUNDATION COURSE TRIANGLES
Of the three angles of a triangle, one is twice the smallest and another is three times the smallest. Findthe angles.
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3 1410783
CLASS 9 FOUNDATION COURSE TRIANGLES
If the angle of a triangle are in the ratio determine three angles.
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4 1410796
CLASS 9 FOUNDATION COURSE TRIANGLES
If the angles of a triangle are in the ratio determine three angles.
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5 1410798
CLASS 9 FOUNDATION COURSE TRIANGLES
The angle of a triangle are arranged in ascending order of magnitude. If the difference between twoconsecutive angles is find the three angles.
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6 1410799
CLASS 9 FOUNDATION COURSE TRIANGLES
Two angles of a triangle are equal and the third angle is greater than each of those angles by Determine all the angles of the triangle.
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2: 3 : 4,
1 : 2 : 3,
100,
300.
7 1410800
CLASS 9 FOUNDATION COURSE TRIANGLES
If one angle of a triangle is equal to the sum of the other two, show that the triangle is a right triangle.
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8 1410802
CLASS 9 FOUNDATION COURSE TRIANGLES
The bisectors of base angles of a triangle cannot enclose a right angle in any case.
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9 1410803
CLASS 9 FOUNDATION COURSE TRIANGLES
If the bisectors of the base angles of a triangle enclose an angle of prove that the triangle is aright triangle.
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10 1410806
CLASS 9 FOUNDATION COURSE TRIANGLES
If each angle of a triangle is less than the sum of the other two, show that the triangle is acute angled.
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11 1410820
CLASS 9 FOUNDATION COURSE TRIANGLES
The exterior angles, obtained on producing the base of a triangle both ways are Find allthe angles of the triangle.
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12 1410835 CLASS 9 FOUNDATION COURSE TRIANGLES
If the angle of a triangle are in the ration then find the measure of smallest angle.
1350,
1040and 1360
.
2: 1 : 3,
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13 1410841
CLASS 9 FOUNDATION COURSE TRIANGLES
The sum of two angles of a triangle is equal to its third angle. Determine the measure of the third angle.
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14 1410845
CLASS 9 FOUNDATION COURSE TRIANGLES
If all the three angles of a triangle are equal, then each one of them is equal to: (b) (c) (d)
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15 1410847
CLASS 9 FOUNDATION COURSE TRIANGLES
An exterior angle of a triangle is equal to and two interior opposite angles are equal. Each of theseangles is equal to (b) (c) (d)
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16 1410851
CLASS 9 FOUNDATION COURSE TRIANGLES
In a triangle, an exterior angle at a vertex is and its one of the interior opposite angle is , thenthe measure of the other interior angle is (b) (c) (d)
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17 1410856
CLASS 9 FOUNDATION COURSE TRIANGLES
If the bisectors of the acute angles of a right triangle meet at then the angle at between the twobisectors is (b) (c) (d)
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900 450 600
300
1000
750 800 400 500
950 550
550 850 400 900
O, O
450 950 1350 900
18 1410863 CLASS 9 FOUNDATION COURSE TRIANGLES
If the measures of angles of a triangle are in the ratio of what is the measure of the smallestangle of the triangle? (b) (c) (d)
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19 1414239
CLASS 9 FOUNDATION COURSE TRIANGLES
Prove that measure of each angle of an equilateral triangle is
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20 1414260
CLASS 9 FOUNDATION COURSE TRIANGLES
The vertical angle of an isosceles triangle is Find its base angles.
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21 1414263
CLASS 9 FOUNDATION COURSE TRIANGLES
If the base of an isosceles triangle is produced on both sides, prove that the exterior angles so formedare equal to each other.
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22 1414273
CLASS 9 FOUNDATION COURSE TRIANGLES
In two right triangles, one side and an acute angle of one triangle are equal to one side and thecorresponding acute angle of the other triangle. Prove that the two triangles are congruent.
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23 1414309 CLASS 9 FOUNDATION COURSE TRIANGLES
In two right triangles one side an acute angle of one are equal to the corresponding side and angle ofthe other. Prove that the triangles are congruent.
3: 4 : 5,
250 300 450 600
600.
1000.
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24 1414336
CLASS 9 FOUNDATION COURSE TRIANGLES
In perpendiculars from any point within an angle on its arms are congruent, prove that it lies on thebisector of that angle.
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25 1414351
CLASS 9 FOUNDATION COURSE TRIANGLES
Show that the sum of the three altitudes of a triangle is less than the sum of three sides of the triangle.
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