Ok, so the 4pi is indicating toward the arc length. Since the radius of the circle is 18, the circumference of the circle is 36pi. If you find the ratio of the arc length to the circumference, you can find the ratio of the indicated angle to the total number of degrees in a circle.
4pi/36pi = 1/9
(indicated angle)/360 = 1/9
(indicated angle = 40
The answer is the 4th choice, or 40 degrees.
The two triangles are congruent to each other, meaning they’re proportional to each other but not equal.
The question is asking you to list the angles that are congruent to each other (when talking about angles and congruency, if two angles are congruent, they are equal) and the sides that are congruent to each other (as long as all sides are proportional to each other, they are congruent (Triangle ABC has side lengths of 1, 2, 3 and Triangle DEF has side lengths of 2, 4, 6; these two triangles are congruent))
Answer:
which class question is this
Ok to reduce fractions you have the find the Greatest Common Factor of both the denominator and nominator and factor it out. In this case the GCF for 15 and 25 is 5 so you would divide 15 and 25 by 5 to get 3/5
