shermoisllo3
04.05.2020 •
Mathematics
What is the sum of (5.4 * 10^5) + (6.7 * 10^4)? Write your answer in scientific notation.
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Ответ:
Yes; two lines intersect at right angles if (and only if) they are perpendicular.
Step-by-step explanation:
In a biconditional statement, both parts have to be true. In this case, if the two lines intersect at a right angle then they are perpendicular, and if they are perpendicular then they intersect at a right angle