c2 arc length and sector area

username2371841

how would you find length of a and b to 3 sig fig

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bump

Have you drawn that?

Original post by Xenonical

Have you drawn that?

yes why?

Reply 5

h3rmit

Original post by sfaraj

yes why?

The circles don't look very... circular

Reply 6

username2371841

Original post by h3rmit

The circles don't look very... circular

as suggested in the title this is a sector question.

the question

a pair of these cutters (the sector) are kept together in a rectangular box of length a cm and b width the cutters fit in the box as shown by figure 2 (what i drew)

find value of a and b to 3 sig fig

Reply 7

MartyO

Considering that image, notice how you can create a right triangle using the length given to you. Using trigonometric ratios, you can find the length of A. Then, given that the two curves are sectors, notice how you can construct a circle with radius A. Then it's a matter of finding the small side of the right triangle using trigonometry and adding the radii to find B.

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fig2.PNG25.5KB