Final answer:
To find the measure of angle A after rotating the pennant 90° clockwise, subtract 90° from the original measure of angle A.
Step-by-step explanation:
To find the measure of angle A after rotating the pennant 90° clockwise, we need to subtract 90° from the original measure of angle A.
Let's say the original measure of angle A is x°. So after rotating the pennant 90° clockwise, the measure of angle A would be x° - 90°.
To determine the specific measure of angle A, we need more information or context that is not provided in the question.