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zackinator4894
24.03.2020 •
Mathematics
Amara wants to draw isosceles right triangles on a coordinate plane that have two vertices at (-2, 4) and (5, 4). If the coordinates of the third vertex are both integers, how many isosceles right triangles can she draw?
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Ответ:
4 isosceles right triangles
Step-by-step explanation:
As the side joining (-2 , 4) and (5 , 4) is horizontal (same y-coordinates)
Its length = 5 - (-2) = 7
∴ The side from the one of the two given vertices to the third vertex must be vertical so it's parallel to the y-axis
The x-coordinate can be -2 or 5
7 is the distance between the y-coordinates of the third vertex and one of the given point
Either: 4 - y = 7 ⇒ y = 4 - 7 = -3
OR: y - 4 = 7 ⇒ y = 4 + 7 = 11
The y-coordinate of the third vertex can be -3 or 11
Therefore, the third vertex is (-2 , -3) , (-2 , 11) , (5 , -3) , (5 , 11)
Amara can draw 4 isosceles right triangles
Ответ:
4 isosceles right triangles
Step-by-step explanation:
As the side joining (-2 , 4) and (5 , 4) is horizontal (same y-coordinates)
Its length = 5 - (-2) = 7
∴ The side from the one of the two given vertices to the third vertex must be vertical so it's parallel to the y-axis
The x-coordinate can be -2 or 5
7 is the distance between the y-coordinates of the third vertex and one of the given point
Either: 4 - y = 7 ⇒ y = 4 - 7 = -3
OR: y - 4 = 7 ⇒ y = 4 + 7 = 11
The y-coordinate of the third vertex can be -3 or 11
Therefore, the third vertex is (-2 , -3) , (-2 , 11) , (5 , -3) , (5 , 11)
Amara can draw 4 isosceles right triangles
Ответ:
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