Rectangle 1 has length 10 and width 20. rectangle 2 is made by multiplying each dimension of rectangle 1 by a factor of k=3. (a). are rectangle 1 and rectangle 2 similar?
(b). show that the perimeter of rectangle 2 is k times the perimeter of rectangle 1.
(c). show the the area of rectangle 2 is k^2 times the area of rectangle 1​

Which equation requires the division property of equality to be solved?

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).