Circle a has been enlarged to create circle b. circle a's circumference was 8. circle b has been enlarged to circumference 28. what scale factor was used to create circle b?

The scale factor 7:2 was used to create circle B.

Step-by-step explanation:

Given:

Circumference of Circle A = 8

Circumference of Circle B = 28

We need to find the scale factor which was used to create circle B.

Solution:

To Scale factor we will Divide Circumference of Circle B with Circumference of Circle A.

framing in equation form we get;

Scale factor =

Hence The scale factor 7:2 was used to create circle B.

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step-by-step explanation:

a. 32 degrees

step-by-step explanation:

here we have to use the rule.

m∠e = 1/2 (major arc - minor arc)

m∠e = 1/2 (212 - 148)

m∠e = 1/2 (64)

m∠e = 32 degrees

answer: a. 32 degrees

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