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1. An angle of a triangle is 180°. This statement is true or false ?2. If the angles of a triangle are in the ratio 1:2:3, then find the measure of all the threeangles.3. The sum of first two angles of a triangle is 108º and the sum of the last two angles is132º. Find the angles.4. In AABC, if ZA-ZB= 15° and ZB-ZC= 15°, then find the value of ZA, ZB and ZC.5. In a triangle, sum of two angles is 100° and their difference is 30°. Find all the angles.6. Each angle of a triangle cannot be more than 60º. Justify the statement.7. In a right-angled triangle, prove that the angle between the bisectors of acute angles isof 1350 |
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Answer» Answer: 1.true 2x+3x+1x=180° 6x=180 x=30 1x=30 2x=60e 3x=90 5.let the angle be x and y X+y=100 x-y=30 adding above 2 we get 2x=130 x=65 y=X+y=100 65+y=100 y=35 let 3RD be z x+y+z=180 100+z=180 z=80 |
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