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Leviafan [203]
3 years ago
13

The radius of a circle is 7 kilometers. What is the length of a 90° arc?

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
4 0

Find the length of the circumference:

Circumference = 2 x pi x radius

Circumference = 2 x 3.14 x 7

Circumference = 43.96 kilometers

90 degrees is 1/4 of a circle ( 360/4 = 90)

Arc length = 43.96/4 = 10.99 kilometers

(Round answer as needed)

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3 years ago
Is the square root of 2 between 1.3 and 1.4
vesna_86 [32]

Well I don't know.  Let's see . . .

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6 0
3 years ago
I need help, I don’t understand how to do this
torisob [31]

ANSWER:

                 m∠1 = 60°

                 m∠2 = 60°

                 m∠3= 120°

EXPLANATION:

The purple arrows indicate that side are parallel, so we know that that triangle NMP is the same as triangle NOP. If they are they same then we know that ∠1 and ∠2 equal 60° since the opposing angles equal 60°.

For ∠3 we look at the opposing angle and now know it is 60°. Since ∠3 and the opposing angle make a straight line which equals 180°. We can figure out ∠3 by subtracting 60 from 180 = 120°.

7 0
3 years ago
Read 2 more answers
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