Angels and their physical composture

بِسۡمِ ٱللَّهِ ٱلرَّحۡمَٰنِ ٱلرَّحِيمِ

It is one of the Pillars of Eemaan to Beleive in The Angels. It is duty
A cleric in South India called P. Jainulabideen (PJ) says
"The verses stating that the Angels perform ‘Sajda’ to Adam (pbuh), must also be understood in the same sense (i. e submission). There are other reasons reinforcing the above view. They do not have any specific physical appearance. There is no evidence to prove that they are having organs, which help in prostration" ref: http://www.onlinepj.com/Quran-pj-thamizakkam-thawheed/quran-thafseer-in-english/11-can-we-prostrate-do-sajda-to-humanbeings/

But here is the truth:
1. They have Wings:
The angels have great physical composure, as Allaah mentioned this about them in His saying: “All praise is for Allaah, the Originator of the heavens and the earth – who made the angels messengers with wings – two or three or four.” [Surah Faatir: 1]
This means that there are some angels that have two wings, some that have three and some that have four. And there are some angels that have more wings than that, for the Prophet (sallAllaahu ‘alayhi wa sallam) saw the angel Jibreel and he had 600 wings – each wing blocking the horizon. This is just one of the many angels that exist. Allaah described him as being mighty in power, as He says: “He (Muhammad) has been taught (this Qur’aan) by one mighty in power.” [Surah An-Najm: 5] He is referring to Jibreel. “Free from any defect, then he rose (and became stable).” [Surah An-Najm: 6]
"This means that he possesses strength and a beautiful appearance." -Sheik Salih Al- Fowzaan

2. In their Original form, they have ears and shoulders:

حَدَّثَنَا أَحْمَدُ بْنُ حَفْصِ بْنِ عَبْدِ اللَّهِ، قَالَ حَدَّثَنِي أَبِي قَالَ، حَدَّثَنِي إِبْرَاهِيمُ بْنُ طَهْمَانَ، عَنْ مُوسَى بْنِ عُقْبَةَ، عَنْ مُحَمَّدِ بْنِ الْمُنْكَدِرِ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ أُذِنَ لِي أَنْ أُحَدِّثَ عَنْ مَلَكٍ مِنْ مَلاَئِكَةِ اللَّهِ مِنْ حَمَلَةِ الْعَرْشِ إِنَّ مَا بَيْنَ شَحْمَةِ أُذُنِهِ إِلَى عَاتِقِهِ مَسِيرَةُ سَبْعِمِائَةِ عَامٍ ‏"‏ ‏.‏
 صحيح   (الألباني)

Jabir b. ‘Abd Allah reported the Prophet (May peace be upon him) as saying :
I have been permitted to tell about one of Allah’s angels who bears the throne that the distance between the lobe of his ear and his shoulder is a journey of seven hundred years.
Sunan Abi Dawud 4727  Sahih (Al-Albani)

3. They have forehead and they all prostrate to ALLAH Azwajal
وعن أبي ذر رضي الله عنه ، قال‏:‏ قال رسول الله ،صلى الله عليه وسلم ‏"‏إنى أرى ما لا ترون؛ أطت السماء وحق لها أن تئط، ما فيها موضع أربع أصابع إلا وملك واضع جبهته ساجداً لله تعالى، والله لو تعلمون ما أعلم، لضحكتم قليلاً، ولبكيتم كثيراً، وما تلذذتم بالنساء على الفرش، ولخرجتم إلى الصعدات تجأورن إلى الله تعالى‏"‏ ‏(‏‏(‏رواه الترمذي وقال‏:‏ حديث حسن‏)‏‏)‏‏.‏ (7)

Abu Dharr (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "I see what you do not see and I hear what you do not hear; heaven has squeaked, and it has right to do so. By Him, in Whose Hand my soul is, there is not a space of four fingers in which there is not an angel who is prostrating his forehead before Allah, the Exalted. By Allah, if you knew what I know, you would laugh little, weep much, and you would not enjoy women in beds, but would go out to the open space beseeching Allah". [ Jami` at-Tirmidhi 2312 ]

Reference: http://abdurrahman.org/faith/angelsattributes.html