As per convention: - the angle at A is named A, the angle at B is named B, and the angle at C is named C - the side of leght a is the side opposed to A, the side of length b is opposed to B, and the side of length c is opposed to C.
A leaf is made up of a variety of specialized tissues that work together to produce food through photosynthesis. Mesophyll, veins, and epidermis are the main tissues. The majority of the leaf's interior is made up of mesophyll. Photosynthesis takes place here.