Chords and Arcs: What is the measure of AC?
(3x – 1.5) (3x+9)

21°

Step-by-step explanation:

The measure of arc AC is twice the measure of the inscribed angle ABC, thus

3x + 9 = 2(3x - 1.5) ← distribute

3x + 9 = 6x - 3 ( subtract 6x from both sides )

- 3x + 9 = - 3 ( subtract 9 from both sides )

- 3x = - 12 ( divide both sides by - 3 )

x = 4

Thus

arc AC = 3x + 9 = 3(4) + 9 = 12 + 9 = 21°

sin3a=12/15

step-by-step explanation:

since one side was multiplied by 3 the other side must also be multiplied by 3.

if the pizza is divided equally into 2 equal halves then you would get

πr^2/2

where r is the radius of the pizza.

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