I do not know if there is a photo for your question but here is a very easy way to tell if a triangle is a right triangle!
A right triangle will always have a<u> 90 degree angle</u> and<u> two acute angles.</u> A 90 degree angle is a angle like the <u>corner</u> of a book or table. An acute angle is anything <u>smaller</u> than a 90 degree angle.