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Alexxandr [17]
3 years ago
14

Give one example of when you would use the friendly numbers strategy to subtract

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
7 0
When there are one positive and one negative 
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What are the coordinates of the vertex of the table? Is it a minimum or a maximum?
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If the legs of a triangle are 6cm and 5cm, find the area of the triangle
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2 years ago
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Question 1
vivado [14]

Answer:

For Lin's answer

Step-by-step explanation:

When you have a triangle, you can flip it along a side and join that side with the original triangle, so in this case the triangle has been flipped along the longest side and that longest side is now common in both triangles. Now since these are the same triangle the area remains the same.

Now the two triangles form a quadrilateral, which we can prove is a parallelogram by finding out that the opposite sides of the parallelogram are equal since the two triangles are the same(congruent), and they are also parallel as the alternate interior angles of quadrilateral are the same. So the quadrilaral is a paralllelogram, therefore the area of a parallelogram is bh which id 7 * 4 = 7*2=28 sq units.

Since we already established that the triangles in the parallelogram are the same, therefore their areas are also the same, and that the area of the parallelogram is 28 sq units, we can say that A(Q)+A(Q)=28 sq units, therefore 2A(Q)=28 sq units, therefore A(Q)=14 sq units, where A(Q), is the area of triangle Q.

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3 years ago
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PLEASE HELP!!! 25 POINTS
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Answer:

Answer: 55

Step-by-step explanation:

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