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Jeff70411
29.01.2020 •
Mathematics
Explain the role of zero pairs when simplifying and algebraic expression using algebra tiles. use a mathematical property to justify your answer
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Ответ:
example
+2, -2 are zero pairs, because +2 +(-2)=0
Ответ:
2. abd and acd are inscribed angles(angles formed by 3 points in a circle) intercepting the same arc, ad, so by an well-known property, their measures are equal.
3. 5x-2°=4x+10°
x=12°
so to find the measure of the angle abd(=m(acd)) substitute x in any of 5x-2 or 4x+10. in both cases we get m(abd)=58°
4. the measure of the arc ad is twice the measure of the inscribed arc abd, so the measure of arc ad is 116°