Mathematics
Grade9
Easy
Question
Calculate the length OC tangent from a point 15 cm away from the center of a circle of radius 9 cm.
- 13 cm
- 20 cm
- 12 cm
- None of the above
Hint:
In this question, we have to calculate the length OC tangent from a point 15 cm away from the center of a circle of radius 9 cm. as the triangle formed will be the right angled triangle as angle formed by radius and tangent is right angle. so hypotenuse is 15 cm and perpendicular is 9cm and OC being the base. We can easily calculate the base by using pythagoras theorem.
The correct answer is: 12 cm
According the given information, the triangle is right angled triangle
so, hypotenuse = 15cm and perpendicular = 9 cm
let OC be the base .
Hence, the length of OC is 12 cm.
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