Can anyone answer these questions
1 answer:
Answer:
see explanation
see explanationStep-by-step explanation:
21
Note that
(a - )²
= a² - 2 +
= a² + - 2
= 11 - 2
= 9
Thus
(a - )² = 9 ( take the square root of both sides )
a - = 3
22
Since the expression is a perfect square, then
(4x + 5y)²
= 16x² + 40xy + 25y²
Comparing coefficients, then
a - 1 = 40 ( add 1 to both sides )
a = 41
23
99² - 87² ← is a difference of squares and factors as
= (99 - 87)(99 + 87)
= 12 × 186 = 1152, thus
24a = 1152 ( divide both sides by 24 )
a = 48
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Answer:
1. As parallelogram have no line of symmetry, so after no rotation we can get a parallelogram which is mapped onto itself.
2. Now if we reflect the parallelogram ABCD along + Y axis
3. If we reflect the parallelogram ABCD along -X axis
4. If we reflect the parallelogram ABCD along the line , y=x
In all the three cases mentioned above i.e 2,3,and 4 we are getting a parallelogram congruent to ABCD.
