10meters=1000cm
1000-210=890
Mary has 890 centimeters of thread left on the reel.
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In the kitchen. Baking and cooking requires some mathematical
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80% of 90 is 72 and half of 140 equals 70. So 80% of 90 is bigger
Try this option:
According to property such triangle
1. area=0.5*a*b, where a and b - the sides of angle 90°.
Using this equation: 180=0.5*40*b, ⇒ b=9.
2. c²=a²+b², ⇒c=√(9²+40²)=41 - the third side of the triangle;
3. Perimeter=a+b+c=9+40+41=90 cm.
answer: 90 cm.
