Triangle 1.A: Right-angled triangle with one angle given as 37°. The unknown acute angle is marked with a question mark.
Triangle 7.E: Triangle with one angle given as 30°. Another angle is marked with a question mark. The third angle is at vertex E, and its value is not given.
Triangle 2.M: Right-angled triangle with one angle given as 32°. Another angle is marked with a question mark. The third angle is at vertex M. A line segment KH is drawn from vertex K to the hypotenuse, forming two smaller angles at K and a right angle at H.
Triangle 8.A: Right-angled triangle with one angle given as 60°. Another angle is marked with a question mark. The third angle is at vertex A, and its value is not given.
Triangle 3.A: Right-angled triangle with one angle given as 26°. Another angle is marked with a question mark. The third angle is at vertex A, and its value is not given.
Triangle 9.M: Triangle with a right angle indicated. One angle is marked with a question mark. The third angle is at vertex M, and its value is not given. A line segment MP is drawn from vertex M to the hypotenuse, forming a right angle at P.