Which of the following sleeves with an angular shape under the arm is usually cut in one with the front and back of the garment?

The sleeve described as having an angular shape under the arm and typically being cut in one with the front and back of the garment is the kimono sleeve. This design allows for a wide, flowing silhouette that is characteristic of kimono styles.

In kimono sleeves, the construction merges the bodice and sleeve, creating a seamless appearance that is visually appealing and functional, offering ease of movement. This type of sleeve enhances the drape and can add to the overall aesthetic of the garment, making it a popular choice in various types of clothing, particularly in more relaxed or traditional styles.

The other options represent different types of sleeves. A cape typically refers to an outer garment with an open front, while a dolman sleeve is characterized by a wide cut that narrows at the wrist but generally includes a separate cuff or seam. A batwing sleeve is similar to a dolman but is more exaggerated in its shape and can give the appearance of a wing. While all these sleeve styles have unique features, the kimono sleeve specifically fits the description provided.