Mathematics
In the adjoining figure, measure the lengths of the sides of the triangle ABC and verify:

(i) AB + BC > AC
(ii) BC + AC > AB
(iii) AC + AB > BC
Lines & Angles
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Answer
On measuring the sides of triangle ABC with the help of a ruler, we get:
AB = 4.5 cm, BC = 5 cm, AC = 3.5 cm
(i) AB + BC = 4.5 cm + 5 cm = 9.5 cm
Since 9.5 cm > 3.5 cm,
∴ AB + BC > AC is verified.
(ii) BC + AC = 5 cm + 3.5 cm = 8.5 cm
Since 8.5 cm > 4.5 cm,
∴ BC + AC > AB is verified.
(iii) AC + AB = 3.5 cm + 4.5 cm = 8 cm
Since 8 cm > 5 cm,
∴ AC + AB > BC is verified.
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Related Questions
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(i) AB + BC = AC
(ii) AC - BC = AB
In the adjoining figure, verify by measurement that:

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What fraction of a clockwise revolution does the hour hand of a clock turn through when it goes from:
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(iii) 7 to 10
(iv) 8 to 5
(v) 11 to 5
(vi) 6 to 3
Also find the number of right angles turned in each case.
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(iii) starts at 4 and makes of a revolution, clockwise?