Answer:
d. The two angles are acute.
Step-by-step explanation:
Complementary Angles sum up to 90.° Since they both have the same measure, take half of 90° to get two exact same measures of 45°. Now, if you have noticed, you can tell that 45° is considered acute because it is less than a ninety-degree right angle:
180° → Straight Angle
Less than 180°, but greater than 90° → Obtuse Angle
Less than 90°, but greater than 0° → Acute Angle
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