East Malaysia is 50% bigger than Peninsular Malaysia at , comparable with South Dakota or Great Britain. East Malaysia contains the five highest mountains in Malaysia, the highest being Mount Kinabalu at 4095 m, which is also the highest mountain in Borneo and the 10th highest mountain peak in Southeast Asia. It also contains the two longest rivers in Malaysia – Rajang River and Kinabatangan River. Banggi Island in Sabah and Bruit Island in Sarawak are the two largest islands that are located entirely within Malaysia. The largest island is Borneo, which is shared with Indonesia and Brunei. The second largest island
Brunei particularly religious schools, and also in institutes of higher learning. As of 2004, there are six Arabic schools and one religious teachers' college in Brunei. A majority of Brunei's Muslim population has had some form of formal or informal education in the reading, writing and pronunciation of the Arabic language as part of their religious education. The culture of Brunei is predominantly Malay (reflecting its ethnicity), with heavy influences from Islam, but is seen as much more conservative than Indonesia and Malaysia. Influences to Bruneian culture come from the Malay cultures of the Malay Archipelago. Four periods of cultural influence