yeah class 10th ka math h plz solve it friend's anyone will be solve this question
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Answer: 5 cm
Explanation:
Given:
☛ AB is a tangent.
☛ AB = 4 cm and OA = 3 cm
To Find:
☛ OB = ?
Solution:
∠OAB = 90° { Radius is perpendicular to the tangent at the point of contact }
So, In △OAB, by Pythagoras Theorem
☛ OB² = AB² + OA²
☛ OB² = (4)² + (3)²
☛ OB² = 16 + 9
☛ OB = √25
☛ OB = 5 cm
Hence, OB = 5 cm.
What is Pythagoras Theorem?
It states that In a right angled triangle the square of the longest side ( hypotenuse ) is equal to the sum of the squares of the other two sides ( base and perpendicular ).
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