Question

The radius of a circle is 9 cms. Find the length of an arc of this circle which cuts off a chord of length equal to length of radius.

Answer 1

@kc_kennylau

Answer 2

Draw it?

Answer 3

Actually that's what i have the problem with then i can solve it

Answer 4

Okay, I'll help you draw it step by step

Answer 5

Draw a circle first

Answer 6

Draw an arc from the intersection point

Answer 7

Draw the chord formed, i.e. AB

Answer 8

what is theta i mean the angle

Answer 9

Indicate the length of AB

Answer 10

i didn't get u

Answer 11

What's the length of AB?

Answer 12

not given

Answer 13

Read the question again?

Answer 14

lol yes 9 cms

Answer 15

so can we apply cosine law here to find theta

Answer 16

No we don't need the cosine law

Answer 17

Write the 9cm in the drawing

Answer 18

Notice anything special about the triangle formed?