An acute angle (acute meaning sharp) is an angle smaller than a right angle (it is less than 90 degrees). Related pages[change | change source] This short article about mathematics can be made longer. You can help Wikipedia by adding to it.
Chondrosarcoma is a cancer composed of cells derived from transformed cells that produce cartilage. Chondrosarcoma is a member of a category of tumors of bone and soft tissue known as sarcomas. About 30% of skeletal system cancers are chondrosarcomas. It is resistant to chemotherapy and radiotherapy. Unlike other primary bone cancers that mainly affect children and adolescents, chondrosarcoma can present at any age.
An angiosarcoma is a rare form of cancer that starts in the inner layer of cells of the blood vessels. It can develop in any part of the body, however, about half of all cases are seen in the head and neck region. Other most common sites seen to occur are in the skin, soft tissues, breast, spleen, liver, bone and heart.