The angles of the rhombus are 1: 2. Find the perimeter of the rhombus if the smaller diagonal is 15 cm.

1. Determine how many degrees are one part of the ratio of the angles.

360 / (1 + 2) = 120 °.

2. How much is the acute angle?

120 * 1/2 = 60 °.

3. The magnitude of the blunt.

120 * 2/2 = 120 °.

4. Draw a diagonal and lower the height from an acute angle, which will divide it in half.

5. Find out the length of the side.

7.5 * 2 = 15 centimeters.

6. Find the perimeter.

15 * 4 = 60 centimeters.

Answer: 60 centimeters.