Ple: Isabel builds two identical rectangular
doors for her puppet theater. There is
a square window in the top half of each
door and each bottom half is solid, as
shown in the diagram below.
30 in.
40 in.
In the diagram, d represents the length,
in inches, of the diagonal brace on the
bottom half of each door. What is the
length of each brace in inches?

theres no picture: /

step-by-step explanation:

d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi