The circumference of circle C is 90 cm. What is the length of AB (in red)? Help please

Mathematics

2 answers:

VMariaS [17]2 years ago

7 0

Answer:

30cm

Step-by-step explanation:

a circle is 360 degrees

120/360 = 1/3 the circumference

90 cm * 1/3 = 90 / 3 = 30

Ugo [173]2 years ago

5 0

Answer:

30 cm

Step-by-step explanation:

The length of the arc AB is calculated as

circumference × fraction of circle subtended by AB, that is

AB = 90 × $\frac{120}{360}$

= 90 × $\frac{1}{3}$ = 30 cm

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Ratio in which 180 should be divided is 4:5:9
firstly we need to find the total number of portions
this we can find by adding all the numbers making up the ratio
4 + 5 + 9 = 18
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when dividing 180 into the respective ratio 4:5:9 the portions are as follows
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therefore when we divide 180 in the ratio 4:5:9
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