1. **Problem statement:** You want an image of a rectangle and to know how to find its angles. 2. **Key formula / rule:** A rectangle has four right angles. $$\angle A = \angle B = \angle C = \angle D = 90^\circ$$ 3. **Important rule:** Opposite sides of a rectangle are parallel, and every corner is a right angle. 4. **How to find the angles:** - If the shape is already a rectangle, each interior angle is $90^\circ$. - If you know one angle in a rectangle, the others are still $90^\circ$ because all rectangle corners are equal. 5. **Final answer:** The angles of a rectangle are all $90^\circ$.