Betty had $70. She bought a necklace for $9 and a ring for $7. Which expression correctly shows the total money Betty has left?
2 answers:
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Answer:
<h2>8 units²</h2>Step-by-step explanation:
Let side of the square = a
The , Area of square = a²
Now, Midpoint of Diagonal DB is E
And DE = 2 units
So, DB = 2 DE = 2 × 2 = 4 units
Now, using Pythagoras theorem in ∆ BCD
DB² = DC² + BC²
plug the values
Collect like terms
Evaluate the power
Swipe the side of the equation
Divide both sides of the equation by 2
Calculate
Therefore, The area of the square is 8 sq.units.
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