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Ask QuestionPosted by Ayush Panda 6 years ago
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Yogita Ingle 6 years ago
r = 14 cm
Circumference = 2 π r
= 2 × 22/7 × 14
= 2 × 22 × 2
= 44 × 2
= 88 cm
Posted by Santosh Yadav 6 years ago
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Yogita Ingle 6 years ago
Surds are the square roots (√) of numbers which don’t simplify into a whole or rational number. It cannot be accurately represented in a fraction. In other words, a surd is a root of the whole number that has an irrational value. Consider an example, √2 ≈ 1.414213, but it is more accurate to leave it as a surd √2.
Binomial Surds – A surd that is made of two other surds
Posted by Manvi Sharma 6 years ago
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Naman Ahden 6 years ago
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Posted by Lakshya Garg 6 years ago
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Yogita Ingle 6 years ago
∠B = ∠C
Sides AB = AC.
The AO line is a angular bisect.
=> ∠BAO = ∠OAC = ∠A/2
In ΔABC, ∠A + ∠B + ∠C = 180
Since ∠B = ∠C,
∠A + 2∠B = 180
In ΔBAO, ∠B + ∠AOB + ∠OAB = 180
Since ∠OAB = ∠A/2
∠B + ∠AOB + ∠A/2 = 180
2∠B + 2∠AOB + ∠A = 360 (Multiply both sides with 2)
From above ∠A + 2∠B = 180
Hence 180 + 2∠AOB = 360
∠AOB = 90.
Similar way, we can prove that ∠AOC = 90.
Now in ΔAOB, ΔAOC,
AB = BC, AO = AO and all angles are same.
That means ΔAOB and ΔAOC are congruent.
Therefore BO = CO.
That implies, O is center of BC. AO bisects BC.
Posted by Harshal Latta 6 years ago
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Vikash Kumar 6 years ago
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