Geographic of indonesia

Geography of Indonesia( Dutch East Indies)

1. It was divided to many islands.

2. The capital is Jakarta.

3. It is located in the Ring of Fire and has many active volcanoes.

4. Indonesia has many high mountains, the highest of which are over 4000 metres.

5. archipelagic country located in Southeast Asia, lying between the Indian Ocean and the Pacific Ocean. It is located in a strategic location astride or along major sea lanes connecting East Asia, South Asia and Oceania.

6. Indonesia's most fertile land is on the island of Java.

7. There are tropical rainforests and jungles, as well as swampy mangrove areas.

8. It comprises five main islands: Sumatra, Java, Borneo (known as Kalimantan in Indonesia), Sulawesi, and New Guinea; two major island groups (Nusa Tenggara and the Maluku Islands) and sixty smaller island groups.

and others

people can eat food during that time

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69