summer996
18.11.2019 •
Mathematics
Lmnp is a rectangle. find the value of x and the length of each diagonal. ln =7x+9 and mp=9x-9
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Ответ:
see explanation
Step-by-step explanation:
The diagonals of a rectangle are congruent, thus
MP = LN , substitute values
9x - 9 = 7x + 9 ( subtract 7x from both sides )
2x - 9 = 9 ( add 9 to both sides )
2x = 18 ( divide both sides by 2 )
x = 9
LN = 7x + 9 = (7 × 9) + 9 = 63 + 9 = 72
MP = 9x - 9 = (9 × 9) - 9 = 81 - 9 = 72
Ответ:
True, any two right angles are supplementary because they sum to 180.
Step-by-step explanation: