Troy was trying to catch up with the rest of his group, who had left earlier on a kayaking trip. Troy paddled 8 hours
downstream, covering 72 miles before realizing that he had passed his group's campground. He had to paddle back
upstream for 18 miles to get back to his group's campground. If the trip back upstream took Troy 6 hours, how fast
was the river flowing (in mph)?
A. 2 mph
B. 3 mph
C. 6 mph
D. 9 mph

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc