math 10-3

Question

Answer 1

(2)

Step 1:

The decorative window is in the shape of a square with a semi circle on top.

The side of the square .

Draw the related diagram:

Observe the diagram:

The side of the square is diameter of the semi circle.

The radius of the semi circle is .

The area of the semi circle is .

Substitute .

.

The area of the semi circle is .

Step 2:

The area of the square is .

Substitute .

.

The area of the square is .

The area of the decorative window is .

Substitute and .

.

The area of the decorative window is .

Solution:

The area of the decorative window is .