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Answer:
Heyyyyyyyyyyy
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Answer:
60.84 cm²
Step-by-step explanation:
The formula for the area of a square is:
A=s²
A=7.8²
A=60.84 cm²
Answer:
90°
Step-by-step explanation:
Angles in a triangle add up to 180°
The two angles you have add up to 90°
You need another 90° to make it 180°