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Lesechka [4]
2 years ago
8

7. An equilateral triangle has sides of length 6.2cm, correct to the nearest millimetre.

Mathematics
1 answer:
Zolol [24]2 years ago
8 0
Answer: 6.2*3= 18.6cm
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∆ABC is translated 2 units down and 1 unit to the left. Then it is rotated 90° clockwise about the origin to form ∆A′B′C′. The c
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Answer:

A'(-2, 1), B'(1, 0), C'(-1, 0)

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If a point X(x, y) is translated a units right and b units down, the new location is X'(x + a, y + b) whereas if a point X(x, y) is translated a units left and b units up, the new location is X'(x - a, y - b).

If a point X(x, y) is rotated 90° clockwise about the origin, the new location is X'(y, -x)

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If it is then rotated 90° clockwise about the origin, the new location is A'(-2, 1), B'(1, 0), C'(-1, 0)

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Which point would map onto itself after a reflection across the line y = –x?
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Step-by-step explanation:

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