1. D
2. D
I don't know the answer to number 3 sorry.
The angle show with the yellow square has a measure of 90°.
Together with angles 1 and 2, they form a straight angle so we have:
∠1+∠2+90°=180°,
subtracting 90° from both sides we have:
∠1+∠2=90°
If the sum of the measures of 2 angles is 90°, the angles are called complementary.
Since the sum of the measures of angles 1 and 2 is 90°, then these 2 angles are complementary.
Answer: <span>They are complementary</span>
Answer:
<em>a×</em>
<em>a×_</em>
<em>a×_12 </em>
Step-by-step explanation:
1
_
-6
_
2
6×2=12
a×
_
6
_
2
ax
_12
