Use the formula you just learned to help you complete the following. A circle’s diameter is approximately 14 cm. Complete each statement using one of these values: 7, 11, 14, 22, 88, 138, 154, 196, 380, 616.

A.) The circle’s radius is approximately cm.

B.) The circle’s area is approximately cm2.

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?